Get a 603 New Hampshire number — Manchester, Nashua, Concord, Portsmouth or anywhere in NH — on the phone you already own. The Granite State's single statewide prefix on one app. Pick a 603 your customers will recognise on caller ID.
New Hampshire has 1 active area code — 603. You can get a virtual New Hampshire phone number from any of these area codes through CallMama without a US address or SIM card.
New Hampshire was assigned a single area code in 1947: 603, covering the entire state. For nearly 80 years 603 has carried all of NH — Manchester, Nashua, Concord, Portsmouth, the Lakes Region, the White Mountains and the Connecticut River Valley.
New Hampshire is one of only 11 US states that have never received an additional area code — no split, no overlay. The "Live Free or Die" state has held 603 longer than any state in New England has held its original code.
Today 603 remains New Hampshire's only area code. The state's relatively small population (1.4M) and stable cellular demand have kept 603 sufficient without need for an overlay. "603" has become cultural shorthand for New Hampshire identity in a way few state codes match.
New Hampshire is one of 11 US states that have never received an additional area code in 77+ years — 603 has carried the entire state since 1947 without splits or overlays. The "603 identity" is so strong that local businesses, political campaigns and apparel brands use it as cultural shorthand for New Hampshire.
Every New Hampshire area code plotted at its primary city. Click any marker for that code's details. Overlays share geography with their parent code — they're shown offset on the map for visibility.
Every New Hampshire metro covered by a different prefix. Open any card to view its full detail page.
Find your city, find its area code, then activate a number with that prefix.
A local New Hampshire prefix outperforms an out-of-state cell at every customer touchpoint.
New Hampshire's only area code since 1947 — 603 is the unmistakable NH credential. Every Granite State resident, business and political campaign uses it. The First-in-the-Nation Primary, the state legislature, every NH brewery.
NH sits in Eastern Time aligned with Boston (just across the border), New York and DC. A 603 prefix tells East Coast clients you're on their schedule.
NH has no general sales tax and no state income tax. A 603 prefix signals you're in this distinctive tax environment — important for finance, retail and small-business contexts.
603 covers Manchester, Nashua, Concord, Portsmouth, Dover, Rochester, Keene, the Lakes Region — every NH city. One prefix tells every Granite Stater you're local.
NANPA-routed New Hampshire numbers pass carrier authentication, so cold-call recipients see your local prefix instead of a flagged "Spam Likely" tag.
Cancel service and your New Hampshire number is reserved free for 12 months — keep your 603 across seasonal moves and snowbird patterns.
Each New Hampshire area code covers a distinct region. Here's how the population breaks down.
Source: US Census Bureau / ACS estimates.
Pick the digits, install the app, take the first call. That's the whole sequence.
CallMama generates 10–20 available numbers in any New Hampshire area code. Vanity patterns supported.
Install CallMama on the device you already use. Sign in once — your New Hampshire number is linked.
Inbound and outbound on the same device. Local New Hampshire caller ID on every outgoing call.
Search by state, city, or number — then click any code to open its detail page. New Hampshire is in here too.
| State | Area Codes | Time Zone | Count |
|---|---|---|---|
| Alabama | 205251256334659938 | CT | 6 |
| Alaska | 907 | AKT | 1 |
| Arizona | 480520602623928 | MST | 5 |
| Arkansas | 479501870 | CT | 3 |
| California | 213310408415510619650714818916 | PT | 10 |
| Colorado | 303719720970 | MT | 4 |
| Connecticut | 203475860959 | ET | 4 |
| Delaware | 302 | ET | 1 |
| District of Columbia | 202 | ET | 1 |
| Florida | 239305321407561727786813850904954 | ET* | 11 |
| Georgia | 229404470478678706762770912 | ET | 9 |
| Hawaii | 808 | HST | 1 |
| Idaho | 208986 | MT* | 2 |
| Illinois | 217224309312331618630708773779815847872 | CT | 13 |
| Indiana | 219260317463574765812930 | ET* | 8 |
| Iowa | 319515563641712 | CT | 5 |
| Kansas | 316620785913 | CT* | 4 |
| Kentucky | 270364502606859 | ET* | 5 |
| Louisiana | 225318337504985 | CT | 5 |
| Maine | 207 | ET | 1 |
| Maryland | 240301410443667 | ET | 5 |
| Massachusetts | 339351413508617774781857978 | ET | 9 |
| Michigan | 231248269313517586616734810906947989 | ET* | 12 |
| Minnesota | 218320507612651763952 | CT | 7 |
| Mississippi | 228601662769 | CT | 4 |
| Missouri | 314417573636660816 | CT | 6 |
| Montana | 406 | MT | 1 |
| Nebraska | 308402531 | CT* | 3 |
| Nevada | 702725775 | PT | 3 |
| New Hampshire | 603 | ET | 1 |
| New Jersey | 201551609732848856862908973 | ET | 9 |
| New Mexico | 505575 | MT | 2 |
| New York | 212315332347516518585607631646680716718838845914917929934 | ET | 19 |
| North Carolina | 252336704743828910919980984 | ET | 9 |
| North Dakota | 701 | CT* | 1 |
| Ohio | 216234330380419440513567614740937 | ET | 11 |
| Oklahoma | 405539580918 | CT | 4 |
| Oregon | 458503541971 | PT* | 4 |
| Pennsylvania | 215267272412445484570610717724814878 | ET | 12 |
| Rhode Island | 401 | ET | 1 |
| South Carolina | 803843854864 | ET | 4 |
| South Dakota | 605 | CT* | 1 |
| Tennessee | 423615629731865901931 | CT* | 7 |
| Texas | 210214254281325346361409430432469512682713737806817830832903 | CT* | 20 |
| Utah | 385435801 | MT | 3 |
| Vermont | 802 | ET | 1 |
| Virginia | 276434540571703757804 | ET | 7 |
| Washington | 206253360425509564 | PT | 6 |
| West Virginia | 304681 | ET | 2 |
| Wisconsin | 262414534608715920 | CT | 6 |
| Wyoming | 307 | MT | 1 |
| Puerto Rico | 787939 | AST | 2 |
One tap to install. One more to call. It really is that simple.
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