Manchester, NH Area Code

Area code serving Manchester

Manchester sits in New Hampshire, part of the Northeast region and the Eastern Time zone. Its area code is 603, which covers the entire state of New Hampshire. 603 has no overlay today, so every Manchester landline and mobile number with a local code starts with 603.

603 has served the area since 1947, as one of the original 1947 North American area codes. If the region runs low on numbers, regulators will most likely add an overlay code on top rather than split the area, which would make 10-digit dialing mandatory.

Code	Area served	In service
603	The entire state of New Hampshire	January 1, 1947

Nearby cities sharing this area code

• Nashua
• Concord
• Derry
• Dover
• Rochester
• Salem
• Merrimack
• Hudson
• Londonderry
• Keene
• Portsmouth
• Laconia
• Lebanon

Getting a Manchester phone number

Any new landline, mobile or VoIP number from a local carrier in Manchester gets the 603 area code. Numbers come from the blocks each carrier holds in the area; a number ported in from elsewhere keeps its original area code, so you may also see out-of-state codes locally.

Dialing in Manchester

Manchester is covered by the single area code 603 with no overlay, so some local calls may still connect with seven digits. Dialing all 10 digits (area code + seven-digit number) always works and is the safest habit. From outside the US, dial +1, then the area code and number. See 10-digit dialing and overlay area codes for the background. For every code in New Hampshire, visit the New Hampshire area codes page.