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Massachusetts is in country code +1, which is North America, including the USA, most U.S. territories, Canada, and a variety of islands in or near the Caribbean.

There are several area codes for different parts of Massachusetts.

+1 413 = western Mass.

+1 617 and +1 857 = Boston and inner suburbs

+1 781 and +1 339 = outer suburbs of Boston

+1 978 and +1 351 = northeastern Mass.

+1 508 and +1 774 = southeastern Mass. including Cape Cod

(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, and many other countries use different prefixes.)

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12y ago

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