Area codes 978 and 351

Area codes 978 and 351 are telephone area codes in the state of Massachusetts, United States. It was created on September 1, 1997, when it was split from area codeAndover, Massachusetts 508. It covers the northeastern part of Massachusetts, including cities and towns such as Lowell, Lawrence, Fitchburg, Haverhill, Andover, and Leominster. It was overlaid by 351 in 2001.

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