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