All 1 New Hampshire Area Code
Every active code: tap any card for its full guide, who called, cities and ZIPs, map, spam patterns and local time.
New Hampshire Area Codes by City
The largest New Hampshire communities and the area code that serve them. Every city links to its local AT&T internet page.
| City | Area code(s) |
|---|---|
| Nashua | 603 |
| Manchester | 603 |
| Claremont | 603 |
| Concord | 603 |
| Epping | 603 |
| Hooksett | 603 |
| Keene | 603 |
| Londonderry | 603 |
| Portsmouth | 603 |
| Rochester | 603 |
| Somersworth | 603 |
How New Hampshire Got Its Codes
Every New Hampshire area code, in the order it entered service. Splits carved new regions; added codes overlay existing ones, which is why ten-digit dialing is standard.
| In service | Code | How it arrived |
|---|---|---|
| 1947 | 603 | One of the original area codes of 1947 |
Source: NANPA NPA database, July 2026. Regenerated monthly.
New Hampshire Area Code Map
Every active New Hampshire area code at a glance, anchored to the metro each one serves. Tap any code above for its detailed coverage map.
↓ Printable PDFOpen the printable New Hampshire area code map (PDF) — poster format with a QR code back to this page.
Internet, wireless & stores across the state
AT&T Home Internet in New Hampshire
AT&T home internet is available across New Hampshire, checked address by address; every area code guide above lists its cities and what’s offered there.
AT&T Fiber: Ltd. avail/areas. Speeds based on wired connection. Actual speeds vary. For 5-GIG, single device wired speed maximum 4.7Gbps. For more info., visit att.com/speed101.
Start with home internet in New Hampshire, or pair it with wireless in an internet + wireless bundle.
AT&T Wireless in New Hampshire
AT&T’s 5G network covers most of New Hampshire. ActiveArmor® spam blocking is included with every unlimited plan, your number stays yours when you move between New Hampshire codes, and great cell phone deals in New Hampshire are a tap away.
AT&T may temporarily slow data speeds if the network is busy. 5G req’s compatible plan & device. Coverage not available everywhere. Learn more at att.com/5Gforyou.
AT&T Stores Across New Hampshire
From the Nashua metro to Concord, Manchester and beyond, walk in for switching, porting, upgrades and hands-on help. Every area code guide lists its nearest stores.
Find stores in: Nashua · Concord · Manchester · Claremont · Salem
