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857 Area Code in Massachusetts, MA
857 Area code info
The American 857 area code serves Boston and other 12 cities.
| Primary City | Boston, MA |
| Assigned | 21% |
| Time Zone | Eastern |
| Coordinates | 42.3124,-71.09405 |
857 Area Code MAP
All Cities served by 857 area code
| City | Population | Percent of 857 | Percent of City |
|---|---|---|---|
| Belmont, MA | 24729 | 3% | 100% |
| Boston, MA | 617594 | 37% | 65% |
| Brookline, MA | 58732 | 4% | 100% |
| Cambridge, MA | 105162 | 4% | 100% |
| Chelsea, MA | 35177 | 2% | 100% |
| Everett, MA | 41667 | 2% | 99% |
| Milton, MA | 27003 | 8% | 100% |
| Newton, MA | 85146 | 11% | 100% |
| Quincy, MA | 92271 | 17% | 100% |
| Somerville, MA | 75754 | 3% | 99% |
| Watertown Town, MA | 31915 | 3% | 100% |
| Winthrop Town, MA | 17497 | 5% | 100% |
857 Area code history
The American area code 857 was first put in service May 2, 2001. It was created from area code 617. This area code now serves Boston and 12 other cities.
857 Area Code Usage
% Assigned
% Usage
Nearby Area Codes
- 617 (Boston)
- 339 (Boston)
- 781 (Boston)
- 351 (Lowell)
- 978 (Lowell)
- 508 (Worcester)
- 774 (Worcester)
- 413 (Springfield)
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