North American Numbers
State · 1 area codes
New Hampshire area codes
New Hampshire is served by a single statewide area code (603) covering Manchester, Nashua and Concord.
A · Metros
Major metro areas
Manchester Nashua Concord
B · Directory
All New Hampshire area codes
Every code opens its profile — codes with a full write-up show their place; the rest show live numbering data while their detailed profile is added.
Sources
Wikipedia ↗
List of NANP area codes (secondary)
Compiled by North American Numbers, last checked 2026-09-19. How this is made.