Welcome to NHPhoneLookup.com – New Hampshire’s #1 Site for Phone Number Lookups & Area Code Directory
- Complete List of New Hampshire Area Codes & the Cities They Serve — Explore our full New Hampshire area code database to see exactly which towns and cities fall under the 603 area code. From Manchester and Nashua to Concord, Dover, Rochester, Keene, Portsmouth, Laconia, and Lebanon, our New Hampshire reverse phone lookup makes it easy to connect any 603 area code and prefix with its specific location.
- New Hampshire’s Largest Cities – Population, Area Codes & Common Prefixes — Learn which phone prefixes are assigned within the 603 area code for major cities like Manchester, Nashua, Concord, Dover, Rochester, Keene, Portsmouth, Laconia, and Lebanon. This quick reference can help you recognize where a call is likely coming from before you even run a complete New Hampshire reverse phone search.
- New Hampshire’s Largest Counties – Population, Cities, Area Codes & Popular Prefixes — See how the 603 area code is divided among New Hampshire’s most populated counties, including Hillsborough, Rockingham, Merrimack, Strafford, and Grafton. You’ll also find the most frequently used prefixes in each county, so you can confirm if a number is genuinely local or possibly coming from a spoofed source.
- New Hampshire Reverse Phone Lookup — Receiving an unknown call or suspicious text from a 603 number? Our reverse phone lookup for New Hampshire instantly pulls the caller’s name, location, phone type, carrier, and other available public data, giving you the information you need to decide whether to answer or block. Whether you need a Manchester phone number search, a Nashua reverse lookup, or a Concord phone trace, our tools provide fast and accurate results.
- Free New Hampshire Phone Lookup Resource — Use our step-by-step guide to track New Hampshire phone numbers, identify common NH phone scams, block robocalls, and detect spoofed 603 numbers — all without any paid subscription. Take advantage of our Free Manchester phone lookup, Free Nashua reverse lookup, or Free Portsmouth number search to uncover callers in seconds.
- New Hampshire Phone Lookup FAQ — Find straightforward answers to the most common questions about New Hampshire phone numbers, reverse phone searches, the 603 area code, phone prefixes, and methods for confirming a caller’s real location before you pick up.
Looking for the quickest, most reliable way to identify an unfamiliar New Hampshire phone number? NHPhoneLookup.com is your go-to platform for reverse phone lookups in the Granite State — helping you find the caller’s name, city, phone carrier, prefix number, and any available public records linked to a 603 number.
Whether the call originates from Manchester, Nashua, Concord, Dover, Rochester, Keene, Portsmouth, Laconia, or Lebanon, our New Hampshire phone search tools work within seconds. Many residents rely on our service to confirm whether a number is genuinely local or part of a scam using a fake 603 area code.
This site is built to help you:
- Trace New Hampshire phone numbers using area codes and prefixes.
- Understand how the 603 area code is assigned across NH cities and counties.
- Spot common scam calls, telemarketers, and robocalls targeting New Hampshire residents.
- Access the New Hampshire phone directory for complete caller details.
Scroll down to view our full New Hampshire area code list by city, detailed NH prefix directories by county, and expert tips for running the most accurate reverse phone search. With complete coverage of the 603 area code, NHPhoneLookup.com helps you identify any caller quickly and with confidence.
New Hampshire Area Code – 603: How It Works & How to Trace Any New Hampshire Phone Number
Every New Hampshire phone number starts with the state’s single 603 area code, which indicates the general region where the number was first assigned. While New Hampshire only has one active area code, the prefix number that follows it can pinpoint the exact city, town, or community where the number originated.
Whether you’re getting a call from Manchester, Nashua, Concord, Dover, Rochester, Keene, Portsmouth, Laconia, or Lebanon, recognizing the 603 area code is the first step in your New Hampshire reverse phone lookup.
New Hampshire’s 603 Area Code Coverage
603 Area Code – The 603 area code covers the entire state of New Hampshire, from the southern border near Massachusetts to the northern tip by Canada. Major cities and regions include:
- Manchester – The largest city in the state, known for business, culture, and higher education. Many residents run a Manchester phone number lookup or 603 reverse lookup to verify a caller’s identity.
- Nashua – A major commercial hub close to the Massachusetts border. A Nashua reverse lookup can confirm if a call is truly from a local business or resident.
- Concord – The state capital, located in Merrimack County. A Concord phone number search helps check whether a number is authentic and tied to a local address.
- Dover – Part of the Seacoast region. A Dover reverse lookup is often used for calls from businesses, schools, and local services.
- Keene, Portsmouth, Laconia, Lebanon, and other communities also fall under the same 603 code, with specific prefix numbers linked to each area.
Why Prefix Numbers Matter in New Hampshire Phone Searches
While the 603 area code identifies the state, New Hampshire prefix numbers — the three digits immediately following the area code — can reveal the specific locality, and sometimes even the neighborhood, where the number was first assigned.
At NHPhoneLookup.com, you can combine 603 area codes with prefix numbers to identify exactly where a call may have originated. Our New Hampshire phone directory can provide details such as:
- Caller’s name
- Business name (if applicable)
- Previous addresses
- Social media profiles
- Phone type (mobile, landline, or VoIP)
- Carrier information
Avoiding New Hampshire Spoofed Calls & Scams
Scammers sometimes disguise their real number with a local-looking 603 area code to appear as though they’re calling from Manchester, Nashua, or another New Hampshire city. This tactic — called neighbor spoofing — tricks people into picking up calls they might otherwise ignore.
Our 603 reverse lookup tool verifies the number’s actual origin so you can avoid answering scam or robocalls.
Use Cases for Our New Hampshire Reverse Lookup Tool
- Checking an unfamiliar number with a 603 reverse lookup, Manchester phone number search, or Nashua reverse lookup
- Searching the New Hampshire phone directory for a name, address, or business
- Identifying New Hampshire prefix numbers to narrow down the call’s source
- Verifying calls using a Concord phone lookup, Dover reverse search, or Portsmouth phone number check
With full coverage of the 603 area code and every prefix in the state, NHPhoneLookup.com delivers fast, accurate, and private results — helping you identify unknown callers and decide whether to answer, block, or report the number.
Complete List of New Hampshire Area Codes & the Cities They Serve
If you’ve received a call or text from a New Hampshire phone number you don’t recognize, the 603 area code is the first and most important clue to where it may have originated. This single set of three digits — whether tied to Manchester, Nashua, Concord, Dover, Rochester, Keene, Portsmouth, Laconia, or Lebanon — can give you strong hints about where the number was first registered.
New Hampshire has just one active area code covering the entire state: 603. While mobile number portability allows people to keep their numbers when they move, many 603 area code and New Hampshire prefix number combinations (the first six digits of a phone number) still reveal valuable details about a call’s origin.
This guide provides a complete 603 area code list by city so you can match any number to its most likely location:
- 603 phone number lookup or 603 reverse lookup for calls from Manchester, Nashua, Concord, and other major New Hampshire cities.
- Manchester phone number lookup to identify calls from central New Hampshire’s largest metro area.
- Nashua reverse lookup to confirm calls from the southern border region near Massachusetts.
- Concord phone number search to verify calls from the state capital and surrounding Merrimack County communities.
- Dover reverse lookup for numbers originating in the Seacoast region.
- Keene phone number lookup, Portsmouth reverse lookup, Laconia reverse lookup, and Lebanon phone search for calls tied to other well-known New Hampshire towns.
Our New Hampshire reverse phone lookup does more than just identify an area code. By including New Hampshire prefix numbers in your search, you can uncover the caller’s name, physical address, phone type (mobile, landline, or VoIP), carrier information, and matches from the New Hampshire phone directory. This helps you quickly determine whether a number is genuine or a spoofed call designed to appear local.
Whether you want to:
- Verify a suspicious 603 area code phone number.
- Identify where a missed call from New Hampshire actually came from.
- Learn more about New Hampshire area codes and prefix numbers.
- Search the New Hampshire phone directory for names, addresses, or businesses.
You’ll find it here. Scroll down to view the full 603 area code list by city and start your New Hampshire phone number search with confidence.
| Area Code | Cities & Towns |
| 603 Area Code | Alton, Amherst, Antrim, Ashland, Bartlett, Belmont, Bennington, Berlin, Bethlehem, Blodgett Landing, Bradford, Bristol, Canaan, Center Ossipee, Center Sandwich, Charlestown, Claremont, Colebrook, Concord, Contoocook, Conway, Derry, Dover, Durham, East Merrimack, Enfield, Epping, Exeter, Farmington, Franklin, Goffstown, Gorham, Greenville, Groveton, Hampton, Hampton Beach, Hancock, Hanover, Henniker, Hillsborough, Hinsdale, Hooksett, Hudson, Jaffrey, Keene, Laconia, Lancaster, Lebanon, Lincoln, Lisbon, Littleton, Londonderry, Loudon, Manchester, Marlborough, Melvin Village, Meredith, Milford, Milton, Milton Mills, Mountain Lakes, Nashua, Newfields, New Hampton, New London, Newmarket, Newport, North Conway, North Walpole, North Woodstock, Peterborough, Pinardville, Pittsfield, Plainfield, Plymouth, Portsmouth, Raymond, Rochester, Sanbornville, Seabrook Beach, Somersworth, South Hooksett, Suissevale, Suncook, Tilton Northfield, Troy, Union, Walpole, Warner, West Stewartstown, West Swanzey, Whitefield, Wilton, Winchester, Wolfeboro, Woodsville. |
New Hampshire’s Largest Cities – Populations, 603 Area Code & Common Prefix Numbers
If you’re trying to figure out where a New Hampshire phone number might be coming from, knowing the 603 area code and the most common prefix numbers for the state’s biggest cities can give you an edge before you even run a free New Hampshire reverse phone lookup.
By combining population data with frequently used 603 prefix combinations (the first six digits of a phone number), you can quickly narrow down whether a call is likely from a major metro like Manchester, Nashua, or Concord, or from a smaller New Hampshire town.
Examples:
- Manchester phone number lookup – 603 numbers with certain prefixes often trace back to central New Hampshire’s largest city.
- Nashua reverse lookup – Common prefixes point to this major southern hub near the Massachusetts border.
- Concord phone number search – Many state capital calls originate from well-known 603 prefix ranges tied to Merrimack County.
- Dover reverse lookup – Popular Seacoast region city with its own distinct set of prefixes.
- Rochester phone lookup – Northern Seacoast community with recognizable number patterns.
- Keene, Portsmouth, Laconia, and Lebanon – Each has its own group of 603 prefixes that make spotting a local call easier.
When you combine 603 area code information with the specific New Hampshire prefix number (the three digits after the area code), you can pinpoint a call’s probable origin with much higher accuracy.
This approach is especially useful if you want to:
- Confirm the true location of a caller before picking up using a free New Hampshire phone lookup.
- Recognize and verify unfamiliar 603 area code numbers using a New Hampshire reverse phone lookup.
- Investigate suspicious texts, robocalls, or spoofed calls posing as local.
- Search the New Hampshire phone directory or run a 603 reverse lookup to get the caller’s name, address, and public records.
Below, you’ll find a city-by-city breakdown of New Hampshire’s largest population centers, all covered by the 603 area code, along with the most common New Hampshire prefix numbers tied to each area. This quick reference is ideal for anyone running a New Hampshire phone number search or verifying a 603 area code lookup before calling back.
| City Name | Facts |
| Manchester | Manchester is New Hampshire’s largest city and the state’s primary economic center. All phone numbers here use the 603 area code. If you get a call from this region, a Manchester phone number lookup or 603 reverse lookup can help confirm the caller’s name and location. Population: ~116,000 Area Code: 603 Common Prefixes: 603-232, 603-263, 603-264, 603-268, 603-296, 603-314, 603-320, 603-339, 603-377, 603-624 |
| Nashua | Nashua, located on the Massachusetts border, is a major commercial hub in southern New Hampshire. Calls from this area will have the 603 area code, and a Nashua reverse lookup can quickly verify the source. Population: ~91,000 Area Code: 603 Common Prefixes: 603-204, 603-233, 603-262, 603-402, 603-417, 603-440, 603-459, 603-521, 603-557, 603-880 |
| Concord | Concord is the capital of New Hampshire and home to many state government offices. Numbers from here will display the 603 area code. Use a Concord phone number lookup to identify unknown callers. Population: ~44,000 Area Code: 603 Common Prefixes: 603-219, 603-225, 603-226, 603-228, 603-229, 603-230, 603-369, 603-393, 603-496, 603-717 |
| Dover | Dover, part of the Seacoast region, is one of the fastest-growing cities in New Hampshire. Calls will have the 603 area code and can be checked with a Dover reverse lookup. Population: ~33,000 Area Code: 603 Common Prefixes: 603-343, 603-373, 603-405, 603-516, 603-534, 603-617, 603-817, 603-834, 603-842, 603-988 |
| Rochester | Rochester is a gateway to New Hampshire’s Lakes Region and White Mountains. All calls use the 603 area code. A Rochester phone number lookup can help you verify unfamiliar numbers. Population: ~26,000 Area Code: 603 Common Prefixes: 603-209, 603-283, 603-352, 603-354, 603-357, 603-381, 603-499, 603-721, 603-762, 603-903 |
| Portsmouth | Portsmouth is a historic seaport and tourist destination on New Hampshire’s coast. Calls from here will display the 603 area code. Use a Portsmouth phone number lookup to confirm caller details. Population: ~22,000 Area Code: 603 Common Prefixes: 603-294, 603-431, 603-436, 603-430, 603-498, 603-501, 603-502, 603-498, 603-834, 603-828 |
| Laconia | Laconia sits between Lake Winnipesaukee and Winnisquam Lake, making it a popular tourist area. All numbers here use the 603 area code. A Laconia reverse lookup can verify local calls. Population: ~22,000 Area Code: 603 Common Prefixes: 603-387, 603-455, 603-524, 603-528, 603-527, 603-581, 603-630, 603-707, 603-729, 603-737 |
| Lebanon | Lebanon is located in the Upper Valley region near the Vermont border and is home to Dartmouth-Hitchcock Medical Center. All numbers here use the 603 area code. A Lebanon phone number lookup helps confirm a caller’s identity. Population: ~14,000 Area Code: 603 Common Prefixes: 603-252, 603-298, 603-306, 603-359, 603-448, 603-523, 603-667, 603-727, 603-790, 603-795 |
| Somersworth | Somersworth is a small city in Strafford County near the Maine border. All phone numbers here use the 603 area code. A Somersworth reverse lookup can check unknown callers. Population: ~12,000 Area Code: 603 Common Prefixes: 603-319, 603-332, 603-335, 603-343, 603-373, 603-509, 603-817, 603-833, 603-842, 603-988 |
New Hampshire’s Largest Counties: Populations, Cities, 603 Area Code & Common Prefix Numbers
Finding out where a New Hampshire phone number truly originates often requires looking beyond just the city name. Because the 603 area code covers the entire state, the most accurate way to track a call’s origin is by understanding how New Hampshire prefix numbers (NPA–NXX) are assigned at the county level.
This county-based New Hampshire phone lookup guide shows how to connect unfamiliar 603 numbers to their most likely source — whether that’s Hillsborough County, Rockingham County, Merrimack County, Strafford County, or Grafton County. If a number appears local, a quick search using the area code + prefix combination can reveal whether it’s actually from New Hampshire or a spoofed 603 number designed to look local.
Unlike city lookups — which focus on places like Manchester, Nashua, or Concord — this 603 reverse phone lookup by county takes a wider view, helping you identify calls based on larger geographic and carrier patterns.
With this guide, you’ll find:
- Active 603 prefixes assigned to each county.
- Major cities and towns tied to those prefixes.
- Common carriers associated with those number ranges.
- Clues that help you spot spoofed or fraudulent calls before answering.
Why a County-Level New Hampshire Reverse Lookup Is Useful
By combining 603 area code data with prefix number details, you can:
- Run a free New Hampshire reverse phone lookup to confirm the caller’s identity before calling back.
- Use a Manchester phone number lookup, Nashua reverse lookup, or Concord phone search to verify missed calls.
- Detect neighbor spoofing scams where telemarketers use a 603 number to appear local.
- Check whether a number is truly from within New Hampshire or coming from out-of-state.
- Narrow down the most likely city and county origin of a 603 phone number.
How to Read 603 Area Code & Prefix Patterns
The area code (first three digits) tells you the call is from New Hampshire, but the prefix number (next three digits) can narrow it to a specific county or region. For example:
- 603-232 – Often linked to Manchester in Hillsborough County
- 603-880 – Commonly tied to Nashua in Hillsborough County
- 603-225 – Frequently used in Concord in Merrimack County
- 603-431 – Associated with Portsmouth in Rockingham County
When you compare the prefix to this county-level breakdown, you can quickly tell if a call is likely genuine or potentially spoofed.
Counties Covered in This Guide
This resource includes every major New Hampshire county and their most common 603 reverse lookup patterns, such as:
- Hillsborough County phone lookup – Manchester, Nashua, Merrimack, Bedford.
- Rockingham County reverse lookup – Portsmouth, Derry, Salem, Exeter.
- Merrimack County phone search – Concord, Hooksett, Bow.
- Strafford County reverse phone lookup – Dover, Rochester, Somersworth.
- Grafton County phone number search – Lebanon, Hanover, Plymouth.
By matching New Hampshire area code data with carrier-specific prefix assignments, you gain a more reliable way to identify who’s calling — whether it’s a neighbor down the street, a local business, or a scam robocall using a fake 603 number. Scroll down to see more.
| County Name | Facts |
| Hillsborough County | Hillsborough County is the most populated county in New Hampshire and includes the cities of Manchester and Nashua — the state’s two largest population centers. This area serves as a major hub for business, healthcare, education, and retail in southern New Hampshire. Every phone number in the county uses the 603 area code, and matching the correct 603 prefix numbers to specific cities can help confirm whether a call is truly local. Population: ~423,000 Major Cities: Manchester, Nashua, Merrimack, Bedford, Goffstown Area Code: 603 Common Prefixes: 603-204, 603-232, 603-233, 603-262, 603-296, 603-320, 603-377, 603-459, 603-521, 603-880 |
| Rockingham County | Rockingham County covers New Hampshire’s Seacoast region and southern border communities, offering a mix of historic towns, tourism destinations, and residential suburbs. It’s home to Portsmouth, a major coastal city, and growing areas like Derry and Salem. A Rockingham County reverse lookup can quickly verify if a 603 number is coming from this region. Population: ~326,000 Major Cities: Portsmouth, Derry, Salem, Exeter, Hampton Area Code: 603 Common Prefixes: 603-294, 603-401, 603-431, 603-432, 603-434, 603-498, 603-501, 603-502, 603-601, 603-929 |
| Merrimack County | Merrimack County sits in central New Hampshire and includes Concord, the state capital. It’s a key location for government offices, education, and regional healthcare. Knowing the 603 prefixes tied to Concord and surrounding towns can help you verify local calls instantly. Population: ~157,000 Major Cities: Concord, Hooksett, Bow, Pembroke, Boscawen Area Code: 603 Common Prefixes: 603-219, 603-225, 603-226, 603-228, 603-229, 603-230, 603-369, 603-393, 603-496, 603-717 |
| Strafford County | Strafford County is part of the Seacoast region and home to Dover, Rochester, and Somersworth. It has a strong mix of manufacturing, healthcare, and education, including the University of New Hampshire in nearby Durham. A Strafford County reverse phone search is useful for confirming whether calls are truly from this region. Population: ~131,000 Major Cities: Dover, Rochester, Somersworth, Durham, Barrington Area Code: 603 Common Prefixes: 603-343, 603-373, 603-405, 603-516, 603-534, 603-617, 603-833, 603-842, 603-868, 603-988 |
| Grafton County | Grafton County is located in western New Hampshire and includes the Upper Valley region along the Vermont border. It’s home to Lebanon, Hanover (Dartmouth College), and popular outdoor destinations. A Grafton County phone lookup can pinpoint numbers tied to this rural yet vibrant area. Population: ~91,000 Major Cities: Lebanon, Hanover, Plymouth, Littleton, Haverhill Area Code: 603 Common Prefixes: 603-252, 603-298, 603-306, 603-359, 603-448, 603-523, 603-667, 603-727, 603-745, 603-795 |
| Belknap County | Belknap County is located in central New Hampshire’s Lakes Region and includes Laconia and Gilford. Known for Lake Winnipesaukee tourism and motorcycle week events, it’s a seasonal hotspot. A Belknap County reverse lookup can confirm whether a 603 call is coming from this recreational area. Population: ~63,000 Major Cities: Laconia, Gilford, Belmont, Meredith, Alton Area Code: 603 Common Prefixes: 603-387, 603-455, 603-524, 603-527, 603-528, 603-581, 603-630, 603-707, 603-729, 603-737 |
| Cheshire County | Cheshire County is in southwestern New Hampshire and is anchored by the city of Keene, known for its historic downtown and educational institutions. Calls from this area can be verified with a Keene reverse lookup or Cheshire County phone search. Population: ~76,000 Major Cities: Keene, Swanzey, Rindge, Jaffrey, Hinsdale Area Code: 603 Common Prefixes: 603-209, 603-283, 603-352, 603-354, 603-357, 603-381, 603-499, 603-721, 603-762, 603-903 |
| Carroll County | Carroll County is located in eastern New Hampshire and is known for its White Mountain towns and lakeside communities. Popular with tourists, it includes Wolfeboro and Conway. A Carroll County reverse lookup can confirm whether a call is from this scenic region. Population: ~50,000 Major Cities: Wolfeboro, Conway, Ossipee, Moultonborough, Wakefield Area Code: 603 Common Prefixes: 603-284, 603-323, 603-356, 603-569, 603-651, 603-733, 603-730, 603-817, 603-901, 603-986 |
| Sullivan County | Sullivan County is a small, rural area in western New Hampshire with a focus on manufacturing and outdoor recreation. Claremont is the largest city, and calls here use distinct 603 prefixes that make local verification easier. Population: ~43,000 Major Cities: Claremont, Newport, Charlestown, Sunapee, Grantham Area Code: 603 Common Prefixes: 603-287, 603-298, 603-310, 603-381, 603-477, 603-504, 603-543, 603-558, 603-863, 603-995 |
| Coös County | Coös County is the northernmost and least populated county in New Hampshire, covering vast forest areas, mountains, and small towns. It’s popular for outdoor sports and tourism. A Coös County phone number lookup can confirm if a number is from this remote area. Population: ~31,000 Major Cities: Berlin, Lancaster, Colebrook, Gorham, Northumberland Area Code: 603 Common Prefixes: 603-237, 603-246, 603-752, 603-921, 603-915 |
New Hampshire Reverse Phone Lookup – Identify Any 603 Area Code Number
Getting calls or texts from a New Hampshire phone number you don’t recognize? Our New Hampshire reverse phone lookup tool makes it fast and simple to identify unknown callers and trace numbers by 603 area code. Just enter the number into the search bar and instantly see details for any call from Manchester, Nashua, Concord, Dover, Rochester, Keene, Portsmouth, Laconia, Lebanon, or any other New Hampshire community.
With one quick search, you can uncover the caller’s name, city, phone carrier, New Hampshire prefix number, and matching results from the New Hampshire phone directory in seconds. Whether you need a Manchester phone number lookup, Nashua reverse lookup, Concord phone search, or any other 603 area code check, you can verify the caller’s identity before answering, calling back, or blocking the number.
🔍 How to Trace the Owner of a New Hampshire Phone Number for Free: Step-by-Step Guide
Need to figure out who’s behind an unfamiliar New Hampshire phone number? Whether you’re running a Manchester phone number lookup, a Nashua reverse lookup, or identifying a 603 area code text from Portsmouth, understanding how New Hampshire phone numbers are structured can give you valuable clues before you even run a full reverse search.
By breaking down the area code, prefix number (central office code), and subscriber number, you can often narrow down a caller’s location to a specific city — and sometimes even to a particular part of town. This free New Hampshire phone lookup guide will walk you through exactly how to analyze a 603 number using the North American Numbering Plan (NANP), then combine it with a Manchester reverse lookup, Concord phone number search, or any other New Hampshire reverse phone search for the most accurate results.
🌎 Country Code
All U.S. phone numbers, including those from New Hampshire, start with the country code +1 when dialed from outside the United States. This confirms the number is U.S.-based, which helps you quickly rule out international spam calls.
Example: +1-603-XXX-XXXX. The +1 confirms the number is from the U.S., and the 603 area code covers all of New Hampshire, including cities like Manchester, Nashua, and Concord. Running a free Manchester phone lookup can verify the caller before you answer.
📍 Area Code (NPA – Numbering Plan Area)
The first three digits after the country code are the area code, which identifies the general geographic region. New Hampshire has only one active area code:
- 603 Area Code – Covers the entire state, including Manchester, Nashua, Concord, Dover, Rochester, Keene, Portsmouth, Laconia, and Lebanon. This is often searched with a 603 reverse lookup or city-specific phone number lookup (e.g., Nashua reverse lookup).
Example: 603-225-XXXX. The 603 area code confirms the number is from New Hampshire.
🔢 Prefix Number (NXX – Central Office Code)
The next three digits after the area code are the prefix number, also known as the central office code. Each prefix is assigned to a specific city, carrier, or neighborhood within the 603 area code. Pairing the area code with the prefix can pinpoint the likely origin of the call.
Example: 603-431-XXXX. The prefix 431 is associated with Portsmouth, so a Portsmouth phone lookup could confirm the caller’s identity.
Pro tip: If you suspect the number might be spoofed, compare the prefix to known New Hampshire exchanges before calling back. Many scam calls use the 603 area code with mismatched prefixes to trick you into answering.
🔐 Subscriber Number
The last four digits of the phone number are the subscriber number, which is unique to the individual line. While it doesn’t reveal location on its own, when combined with the 603 area code and the correct prefix number, it forms a complete number that can be searched in a free New Hampshire reverse lookup for detailed owner information.
Example: 603-524-7890. The 524-7890 part is tied to Laconia, so a Laconia phone number lookup would reveal the name, carrier, and public records linked to that number.
Why This Matters for New Hampshire Reverse Phone Lookup
Knowing how to break down a New Hampshire phone number helps you:
- Identify whether a call is coming from Manchester, Nashua, Concord, Dover, Rochester, or another NH city.
- Spot suspicious or spoofed 603 numbers before answering.
- Confirm if a number is truly local (e.g., 603 reverse lookup for New Hampshire).
- Decide whether to answer, block, or investigate further using the New Hampshire phone directory.
🚀 Take the Next Step — Search Any New Hampshire Number Now
Ready to find out who’s calling? Enter the number below into our New Hampshire reverse phone lookup tool to instantly see the caller’s name, location, carrier, prefix number, and public records. Whether you’re doing a Manchester phone search, a Nashua reverse lookup, or a Portsmouth phone number check, our database covers every 603 area code and prefix so you can search with confidence.
📱 Real Example: How to Break Down a New Hampshire Phone Number for Free
Let’s walk through a real example of how to figure out more about a New Hampshire phone number — without paying for a full report. This method works whether you’re doing a Manchester phone number lookup, a Nashua reverse lookup, or checking a 603 area code call from Portsmouth, Dover, or Concord.
Example number: 📞 603-431-7285
Step 1: Identify the Country Code
When dialed internationally, this number begins with +1, which confirms it’s from the United States — and could be from New Hampshire. This quick check helps rule out overseas spam or scam calls right away.
📍 +1 = United StatesStep 2: Look at the Area Code – 603
The 603 area code covers the entire state of New Hampshire, including Manchester, Nashua, Concord, Portsmouth, Dover, Rochester, Keene, Laconia, and Lebanon. While this tells you the call is from New Hampshire, it’s not yet specific to a single city.
📍 Area Code 603 = All of New HampshireIf you’re running a 603 reverse lookup or a Portsmouth phone search, this confirms you’re dealing with a number registered within the state.
Step 3: Check the Prefix – 431
The prefix number (also called the central office code) is the three digits right after the area code. In this case, 431 is a known Portsmouth prefix often assigned to numbers within the city or nearby Seacoast towns like Rye and New Castle.
📍 Prefix 431 = Portsmouth / Seacoast RegionThis narrows it down from anywhere in New Hampshire to the likely Portsmouth area specifically.
Step 4: Subscriber Number – 7285
The final four digits — 7285 — are unique to that specific phone line. On their own, they don’t reveal the caller’s location, but they complete the full number for a free New Hampshire phone lookup. Full breakdown so far:
📍603 (New Hampshire) + 431 (Portsmouth prefix) + 7285 (individual line)Step 5: Cross-Reference the Area Code and Prefix
To confirm your findings, you can:
- Search “603-431 prefix location” or check our New Hampshire area code and prefix directory
- See if the number appears in a local Portsmouth business directory
- Use our New Hampshire reverse phone lookup tool to uncover the caller’s name, address, phone carrier, and possibly even linked public records or social media profiles
Final Result
Based on this breakdown:
📍 603-431-7285 is likely a personal or business line registered in Portsmouth, New Hampshire- It’s a New Hampshire-based number
- It’s not from Manchester, Nashua, Concord, or other inland areas of the state
Want to go further?
Enter the number below in our free New Hampshire reverse phone lookup search bar to get the caller’s name, location, carrier, prefix information, and any public records tied to it. Whether you need a Manchester reverse lookup, a Nashua phone number search, or a Portsmouth phone lookup, our database covers every 603 area code and prefix so you can search with confidence.
| Part | Meaning | Details |
| +1 | Country Code | United States (includes New Hampshire) |
| 603 | Area Code | New Hampshire |
| 431 | Prefix Number | Portsmouth |
| 7285 | Subscriber Number | Unique to one user or phone line |
What People Across New Hampshire Are Saying About NHPhoneLookup
New Hampshire Reverse Phone Lookup: Frequently Asked Questions
1. What is a New Hampshire reverse phone lookup?
A New Hampshire reverse phone lookup lets you enter any phone number to find details about the caller — including their name, city, and phone carrier. It’s a fast, reliable way to identify unfamiliar numbers, confirm who owns a phone line, or flag possible spam calls from the 603 area code.
2. How can I run a reverse phone lookup for a New Hampshire number?
Simply type the full 10-digit New Hampshire number into our search bar. Our system scans multiple trusted sources to provide information such as the owner’s name, address, and carrier. Whether you’re running a Manchester phone number lookup, a Nashua reverse lookup, or a Portsmouth phone search, our database delivers results quickly.
3. Is it legal to use reverse phone lookup services in New Hampshire?
Yes. Reverse phone lookups use publicly available data and are legal to use in New Hampshire. The information must be used within the bounds of privacy laws — never for harassment or unlawful purposes.
4. What is the main area code in New Hampshire?
New Hampshire uses just one active area code:
- 603 – Covers the entire state, including Manchester, Nashua, Concord, Dover, Rochester, Keene, Portsmouth, Laconia, and Lebanon.
5. Can I look up both landline and cell phone numbers in New Hampshire?
Yes. Our New Hampshire reverse phone lookup can search both mobile and landline numbers. Mobile details may be limited due to carrier privacy rules, but you can still see the city, line type, and often the carrier.
6. What kind of information can I get from a New Hampshire reverse phone lookup?
You may see the caller’s name, current and past addresses, carrier and phone type, possible relatives or associates, and public record links like social media profiles.
7. How accurate is the data from your reverse phone lookup?
We refresh our database frequently — in some cases daily — to give you the most up-to-date and accurate information available. For critical matters, you may want to confirm details with additional sources.
8. Are there free options for reverse phone lookup in New Hampshire?
Yes. A free lookup can give you basic details like the city and carrier. More advanced results, such as background history or property records, may require a paid search.
9. Why do all New Hampshire numbers have the same area code?
New Hampshire’s smaller population means the 603 area code still has available numbers, so there’s no need for additional area codes or overlays yet.
10. How do I recognize spam or scam calls from New Hampshire numbers?
Our tool flags numbers reported for spam or fraud. You can also check FCC and FTC complaint databases to see if a 603 number has been linked to scams.
11. Can your service tell if a New Hampshire number is a VoIP line?
Often yes. Our system can identify whether a number is internet-based (VoIP), which is commonly used by telemarketers and scammers.
12. What does the prefix in a New Hampshire phone number mean?
The prefix — the three digits after the 603 area code — can indicate a more specific city or exchange. Example:
- 603-225 = Concord
- 603-431 = Portsmouth
- 603-524 = Laconia
13. How can I block unwanted calls from New Hampshire numbers?
Use your phone’s call-blocking features or sign up for the National Do Not Call Registry. Many carriers also provide free or low-cost spam-blocking services.
14. Are some New Hampshire cities more prone to spam calls?
Yes. Larger metro areas like Manchester, Nashua, and Concord often see more spam calls simply because of higher populations.
15. Can I confirm if a number belongs to a New Hampshire business?
Yes. Our service can display the business name, address, and sometimes the type of service provided.
16. How often is your New Hampshire reverse phone lookup database updated?
We update our database regularly, with some records refreshed daily, to ensure results are current and accurate.
17. Can a reverse phone lookup show someone’s address in New Hampshire?
If an address is available in public records, yes. Always use personal information responsibly and legally.
18. Will reverse phone lookup work for unlisted New Hampshire numbers?
Sometimes. While unlisted numbers may have less public data, we can often provide partial details like city, carrier, or line type.
19. How can I report a suspicious New Hampshire number?
You can report it to the FTC or FCC, and you can also mark it in our database so other New Hampshire residents are warned.
20. Is your New Hampshire reverse phone lookup mobile-friendly?
Yes. Our site works seamlessly on smartphones and tablets, so you can search anytime and anywhere.
21. Can I use reverse phone lookup to reconnect with someone in New Hampshire?
If the number is still active, you may be able to find updated contact information to reach them.
22. Can I find the time zone for a New Hampshire phone number?
Yes. New Hampshire numbers are in Eastern Standard Time (EST) or Eastern Daylight Time (EDT) during daylight saving.
23. Can I look up toll-free numbers connected to New Hampshire businesses?
Yes. Many toll-free numbers are registered to New Hampshire companies. Our reverse lookup can reveal the business name, location, and industry — whether it’s a Manchester retailer, a Concord service provider, or a Portsmouth-based company.
24. How can I tell if a New Hampshire phone number is spoofed?
Scammers sometimes disguise their real number with a local 603 area code to make it look like the call is from Manchester, Nashua, or another nearby city. Running a New Hampshire reverse phone lookup before answering can help you detect suspicious or fraudulent calls.
25. How do I run a Manchester Reverse Lookup for a 603 number?
Simply enter the full 10-digit 603 number into our search tool. You’ll instantly see caller details for numbers registered in Manchester and surrounding Hillsborough County communities.
26. Can I use a Manchester Phone Number Lookup to find a local business?
Yes. A Manchester phone number lookup can confirm if a number belongs to a legitimate business, along with its address, contact details, and type of service.
27. What’s the best way to check if a call from a 603 Manchester number is spam?
If you’re getting repeated calls from a 603 number in Manchester, run it through our 603 reverse lookup tool to see if other users have flagged it for spam or scam activity.
28. How do I run a Nashua Reverse Lookup for 603 numbers?
A Nashua reverse lookup works for numbers in Nashua and nearby border towns. Just enter the number to see the name, location, and carrier details.
29. Can I use a Nashua Phone Number Lookup to check cell numbers?
Yes. Whether it’s a cell phone or landline, a Nashua phone number lookup can show the caller’s name, carrier, and possible address.
30. What’s the difference between a Concord Phone Number Lookup and a 603 Reverse Lookup?
Both can return similar results, but a Concord phone number lookup focuses on numbers tied to Concord specifically, while a 603 reverse lookup can cover any city in New Hampshire.
31. Can I check if a Concord 603 number is a VoIP line?
Yes. Our tool can often detect whether a number is a landline, mobile, or VoIP — which is important since VoIP numbers are frequently used by telemarketers.
32. How do I identify robocalls from Portsmouth or Dover numbers?
Robocalls may use 603 numbers that appear to be from the Seacoast region. A quick Portsmouth reverse lookup or Dover phone search can tell you if the number is from a real local business or a scammer spoofing the area code.
33. Can I use a Keene Phone Number Lookup to confirm a business call?
Yes. A Keene phone number lookup can verify if a number is connected to a genuine local business or if it’s a spoofed call.
34. What are some common prefixes for Manchester phone numbers?
Manchester numbers in the 603 area code often start with prefixes like 603-232, 603-263, and 603-296. Recognizing common prefixes can help make your 603 phone number searches more accurate.
35. How do I reconnect with old contacts using a Nashua Reverse Lookup?
If you have an old Nashua number, a 603 reverse lookup can help locate updated contact details for past coworkers, friends, or classmates.
36. Can I find out which carrier owns a Concord 603 number?
Yes. Our New Hampshire reverse phone lookup includes carrier information so you can see if the number belongs to AT&T, Verizon, T-Mobile, or another provider.
37. How do I block unwanted calls from 603 numbers?
Run a 603 reverse lookup to confirm who’s calling, then block the number on your phone or report it to the FTC and FCC.
38. Can a Concord Phone Number Lookup show past addresses?
In some cases, yes. A Concord reverse lookup may display previous addresses linked to the number, which is helpful for reconnecting or verifying background information.
39. Are all 603 numbers based in New Hampshire?
Yes. All 603 area code numbers are registered in New Hampshire, but spoofers can fake the area code. A 603 reverse lookup can help confirm if the number is truly local.
40. Why does my Manchester Phone Number Lookup show multiple addresses?
If the number’s owner has moved frequently or uses the same line for both business and personal use, your Manchester phone number lookup may display multiple addresses.
Additional Resources for Understanding New Hampshire’s Area Codes and Phone Numbers
- NH.gov – The official State of New Hampshire website, offering access to public records, state agency directories, and resources for verifying 603 area code phone numbers, confirming caller identities, and locating business listings across New Hampshire.
- North American Numbering Plan Administration (NANPA) – – Provides detailed information on the 603 area code, including prefix assignments, numbering updates, and historical data on how the state’s phone number allocations have evolved.
- Federal Communications Commission (FCC)Outlines federal rules on phone number usage, consumer protection measures, and best practices for reducing spam calls, robocalls, and spoofed numbers affecting New Hampshire residents.
- National Institute of Standards and Technology (NIST)Publishes national technical standards and guidelines that impact telecommunications infrastructure and phone numbering systems, including those used in New Hampshire.
- U.S. Census Bureau – New Hampshire Population & Geographic DataOffers detailed demographic and geographic insights for New Hampshire’s cities and counties, showing how population trends and regional growth affect 603 area code prefix assignments and usage patterns.