State directory / Massachusetts
US number directory / Massachusetts
Massachusetts
area codes
The earliest listed Massachusetts codes are 413, 617, in service since 1947; the state now has 9 geographic codes.
9geographic area codes
in this reference
in this reference
Earliest listed413, 617 · 1947
Standard timeET
Overlays in this stateYes — see code notes
Major city starting points
Boston (capital and largest city): 339, 617, 857.
| City | Reference role | Codes to check |
|---|---|---|
| Boston | Capital and largest city | 339, 617, 857 |
City reference · 2026-10-25
Codes, cities & coverage
Massachusetts's active territorial overlay complexes are 339/781; 351/978; 508/774; 617/857.
| Code | Region / major cities named in the reference | Introduced | Active overlay complexes |
|---|---|---|---|
| 339 | Eastern Massachusetts (suburbs of Boston ) | 02-May-2001 | 339/781 |
| 351 | Massachusetts ( Ashby , Barre , Boxborough , Carlisle , Groveland , Rowley , Wendell , Wenham , and northeastern Massachusetts) | 02-May-2001 | 351/978 |
| 413 | Western Massachusetts | 01-Jan-1947 | None active in NANPA snapshot |
| 508 | Southeastern Massachusetts | 16-Jul-1988 | 508/774 |
| 617 | East-central Massachusetts , including Boston | 01-Jan-1947 | 617/857 |
| 774 | Southeastern Massachusetts | 02-May-2001 | 508/774 |
| 781 | Massachusetts ( Canton , Hanson , Lincoln , Nahant , Plympton , Revere , Stoughton , Winchester , and east-central Massachusetts) | 01-Sep-1997 | 339/781 |
| 857 | East-central Massachusetts , including Boston | 02-May-2001 | 617/857 |
| 978 | Northeastern Massachusetts | 01-Sep-1997 | 351/978 |
NANPA dates & overlays · 2026-10-25
Wikipedia geography · 2026-10-25 · CC BY-SA 4.0
City lookup notes
Time zones
Massachusetts spans 1 standard-time offset in the state reference: ET.
| Standard offset | Region | Daylight saving |
|---|---|---|
| UTC−05:00 ET | Eastern | Yes |