Area code 603

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Area code 603, covering the whole state.

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.

As of April 2011, the 603 code was nearing exhaustion and a second area code for New Hampshire was expected to be activated by 2013. Rather than a split, the New Hampshire Public Utilities Commission recommended that it be implemented as a statewide overlay.[1] However, because of a change in allocation policies and a reclamation of a large block of previously allocated telephone numbers, as well as number pooling, the exhaustion time frame has been moved beyond 2025.[2][improper synthesis?]

Since New Hampshire has only one area code, callers in the state can reach any other telephone within the 603 area code with 7-digit dialing.


  1. ^ "Archived copy". Archived from the original on September 29, 2011. Retrieved November 20, 2010.
  2. ^ David Brooks (1 June 2011). "603 is safe as NH's area code". The Telegraph (Nashua). Retrieved 5 July 2016.

External links[edit]

New Hampshire area codes: 603
North: 819
West: 802 area code 603 East: 207
South: 351/978, 413
Massachusetts area codes: 339/781, 351/978, 413, 508/774, 617/857
Maine area codes: 207
Quebec area codes: 418/581, 438/514, 450/579, 819
Vermont area codes: 802