603 area code
Area code 603 is in New Hampshire, United States, in the Eastern time zone. It covers Derry, Dover, East Concord, Keene, Manchester, Nashua and more.
State / Province
New Hampshire (NH)
Country
United States
Region
Northeast
Time zone
Eastern
Current local time
—
Approx. location
43.0489, -71.3347 ↗
How to dial a 603 number
- National format
- (603) 555-0100
- International (E.164)
- +1 603 555 0100
- From abroad
- +1 603 …
Cities & areas in the 603 area code
8 known locations — a selection:
Derry
Dover
East Concord
Keene
Manchester
Nashua
Portsmouth
Rochester
About area code 603
Area code 603 is one of the North American Numbering Plan (NANP) codes serving New Hampshire. In the NANP a full number looks like +1 (603) NXX-XXXX: the +1 is the country code for the US and Canada, 603 is the area code, and the remaining seven digits identify the specific line. A call is charged by your own carrier's plan, not by the area code itself.