603 Area Code - Location map, time zone, and phone lookup
Where is area code 603? Area code 603 covers the entire state of New Hampshire. It is the only area code that serves the area.
Area code 603 - Wikipedia
Area code 603 is the sole telephone area code in the North American Numbering Plan (NANP) for the U.S. state of New Hampshire. It was assigned as one of the 86 original North American area codes …
603 Area Code Phone Numbers | Whitepages
Browse area code 603 phone numbers, prefixes and exchanges. The 603 area code serves Manchester, Hooksett, Portsmouth, Merrimack, Derry, covering 145 ZIP codes in 15 counties.
603 area code — information, time zone, map
4 days ago · Find out where 603 area code zone from, which states, counties and cities it covers. Get the most exact information on time zones here
603 Area Code - Map, Phone Lookup, Time Zone - Wirefly
Find 603 area code details including city, time zone, and map. Lookup area code 603 phone number, name, and location.
603 Area Code - Location, Time, Map, Cities and Census Data
Apr 1, 2026 · 603 Area Code located in New Hampshire, including 163 cities, 10 counties, 1 time zone, map, Census demographics, and 729 active prefixes.
603 Area Code - National Phone Number Registry
6 days ago · Area code 603 is located in New Hampshire. Get area code location and dialing plans for all phone prefixes in area code 603.
603 Area Code - Location, Map, Current Time, Prefixes
Area code 603 is located in New Hampshire. Get the area’s map, cities covered, current time, prefixes, and dialing instructions.
Area Code 603 - Map, time zone, and phone lookup - CallerCenter
About area code 603: location, common spam callers, related area codes, and more. Includes 603 reverse phone lookup to identify spam callers.
New Hampshire area codes - Map, list, and phone lookup
New Hampshire currently utilizes 1 area code. 603 has covered the entire state since the modern phone system was established by AT&T and the Bell System in 1947.