Massachusetts Area Codes
Compare 9 in-service area codes assigned to Massachusetts. Explore each code’s introduction date, overlays, possible time zones, and public prefix records.
Massachusetts numbering at a glance
- In-service area codes
- 9
- Time-zone labels in NANPA data
- Eastern
- Listed in-service or assigned prefixes
- 4,724 · source dated 2026-09-29
These are numbering assignments. The counts do not represent active phone numbers, current carriers, or a caller’s physical location.
Compare area codes in Massachusetts
| Code | Introduced | Other codes in overlay | Time zones | Listed prefixes |
|---|---|---|---|---|
| 339 | 02-May-2001 | 781 | Eastern | 103 |
| 351 | 02-May-2001 | 978 | Eastern | 90 |
| 413 | 01-Jan-1947 | None listed | Eastern | 598 |
| 508 | 16-Jul-1988 | 774 | Eastern | 747 |
| 617 | 01-Jan-1947 | 857 | Eastern | 768 |
| 774 | 02-May-2001 | 508 | Eastern | 519 |
| 781 | 01-Sep-1997 | 339 | Eastern | 768 |
| 857 | 02-May-2001 | 617 | Eastern | 358 |
| 978 | 01-Sep-1997 | 351 | Eastern | 773 |
Source: NANPA NPA database, dated 2026-09-28. Prefix counts: NANPA US assignment report. View official area-code maps.
Overlay groups in Massachusetts
Codes in an overlay group can serve the same broad numbering area. A person may keep a number after moving, and the displayed number may be spoofed.
Find a number in Massachusetts
Open an area-code page above to check a prefix and possible time zones. You can also search US telephone rate-center names; those names are not exact city coverage.
A code cannot verify the owner of a number. If an unexpected caller asks for money or sensitive information, verify the claim independently.