The area code 781 is located in Lynn, Massachusetts.
Area code 781 serves Lynn, Massachusetts, and a wide stretch of the Boston suburbs on the North Shore and South Shore. Centered on the Atlantic coast, Lynn sits just north of Boston and is known for Lynn Woods Reservation, one of the largest municipal parks in the U.S., plus the scenic Lynn Shore & Nahant Beach Reservation and historic High Rock Tower. The 781 area code helps connect busy residential neighborhoods, coastal communities, and business hubs across the region. It operates in the Eastern Time Zone and covers parts of Essex, Middlesex, and Norfolk counties.
Major communities in the 781 area code include:
These cities and towns mix thriving downtowns, tech and retail centers, and historic sites—think the Burlington Mall, Waltham’s “Watch City” heritage, and Hingham’s harbor. Landlines and mobile phone numbers across these communities often appear as 781 or its overlay, 339.
History and dialing: Area code 781 was established in 1997 after splitting from 617 to handle growth in Greater Boston’s suburbs. The 339 overlay was added in 2001, which means new numbers may use either 781 or 339, and 10-digit dialing is required for local calls. "Overlay 339 was introduced in 2001 for the 781 NPA." — North American Numbering Plan Administration (NANPA). Today, 781 remains a familiar code for North Shore and South Shore phone numbers, especially in and around Lynn, MA.