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Somersworth, NH is currently using only one area code which is area code 603. Area code 603 covers the entire state of
New Hampshire, including Somersworth, and was established in 1947. In addition to Somersworth, NH area code 603 serves the larger communities of Concord, Derry, Dover, Keene, Manchester, Nashua, Portsmouth
and Rochester. Somersworth, NH does not utilize any area code overlays. |
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