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Area code 603 is the sole area code for the U.S. state of New Hampshire in the North American Numbering Plan (NANP). It was created as one of the original 86 numbering plan areas in October 1947.
603 is an area code located in the state of New Hampshire, US. The largest city it serves is Manchester. Find out where 603 area code zone from, which states, counties and cities it covers. Get the most exact information on time zones here.
Find 603 area code details including city, time zone, and map. Lookup area code 603 phone number, name, and location.
Area Code 603 is located in New Hampshire. It covers 163 cities, including Manchester, Nashua, Concord, Dover, and Rochester. It also covers 10 counties, including Hillsborough County, Rockingham County, Grafton County, Merrimack County, and Strafford County.
Get information and map of 603 area code, New Hampshire which shows the counties covered in it. Also get the county list which belongs to area code 603.
Area code 603 is located in New Hampshire. Get the area’s map, cities covered, current time, prefixes, and dialing instructions.
Lookup information on Area Code 603 - get demographic, NPA NXX, and other data by area code