Area code 781 serves the suburban areas north and south of Boston, Massachusetts, including cities like Waltham, Lynn, Quincy, and Weymouth. Created in 1997 from a split with 617, it now shares its territory with overlay 339. The region includes commuter towns, tech corridors, and historic seaports, forming a vital part of Greater Boston’s economy and culture. Ten-digit dialing is required. Area code 781 has become a key identifier in Boston’s suburban landscape, representing both traditional New England roots and the fast-paced growth of the metro area.