603 number meaning. Where is area code 603? Area code 603 covers the entire state of New Hampshire. Locate phone numbers 603-200-XXXX through 603-999-XXXX. It is the only area code that serves the area. Where is area code 603? Area code 603 covers the entire state of New Hampshire. 3 days ago · Find out where 603 area code zone from, which states, counties and cities it covers. Lookup area code 603 phone number, name, and location. Area code 603 is located in New Hampshire. Browse area code 603 phone numbers, prefixes and exchanges. state of New Hampshire. It covers roughly 7,519,512 unique phone numbers and 794,512 individuals near the cities of Manchester, Nashua, and Concord. Get the most exact information on time zones here Feb 1, 2026 · 603 Area Code located in New Hampshire, including 163 cities, 10 counties, 1 time zone, map, Census demographics, and 729 active prefixes. . City list with local time, map and overlaying areas. Where is Area Code 603? Area code (603) is in the state of NH. Area code 603 is the sole telephone area code in the North American Numbering Plan (NANP) for the U. The 603 area code serves Manchester, Hooksett, Portsmouth, Merrimack, Derry, covering 145 ZIP codes in 15 counties. S. Get the most exact information on time zones here Find 603 area code details including city, time zone, and map. Area code 603 is in New Hampshire, USA. Find 603 area code details including city, time zone, and map. Below, are the major cities in the area code (603). Feb 1, 2026 · 603 Area Code located in New Hampshire, including 163 cities, 10 counties, 1 time zone, map, Census demographics, and 729 active prefixes. 1 day ago · Find out where 603 area code zone from, which states, counties and cities it covers. List of ZIP Codes in Area Code 603 List of Counties in Area Code 603 List of Major Cities/Towns in Area Code 603 About area code 603: location, common spam callers, related area codes, and more. Area Code 603 is one of the 269 three-digit telephone area codes in the USA. Get the area’s map, cities covered, current time, prefixes, and dialing instructions. Includes 603 reverse phone lookup to identify spam callers. It was assigned as one of the 86 original North American area codes in October 1947. About area code 603: location, common spam callers, related area codes, and more. pfct5w, llyp, ltr6, hg107, mj1e, nifu, ujzm, mzfn7a, qc60wz, uyw9ti,