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.

In 2011, area code 603 was said to be nearing exhaustion and a second area code for New Hampshire was expected to be activated by 2013 as a statewide overlay plan.[1] As a result of changes in allocation policies and a reclamation of a large block of previously allocated telephone numbers, including number pooling, the exhaustion time frame has been moved to at least 2032.[2]

10-digit dialing[]

Prior to October 2021, area code 603 had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.[3]

References[]

  1. ^ "Archived copy". Archived from the original on September 29, 2011. Retrieved November 20, 2010.{{cite web}}: CS1 maint: archived copy as title (link)
  2. ^ Dave Brooks (18 May 2016). "Area code 603 will reign supreme thanks to technology". The Concord Monitor. Retrieved 17 March 2019.
  3. ^ "Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF). North American Numbering Plan Administrator. January 8, 2021. Retrieved March 9, 2021.

External links[]

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: 367/418/581, 438/514, 450/579, 819/873
Vermont area codes: 802
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