Phone number reference · United States
617 area code
Boston and nearby eastern Massachusetts communities.
617 is associated with Boston and nearby communities, including Cambridge. The 857 overlay shares that region. Other parts of Massachusetts use separate numbering areas, so a Boston business should ask for the city when quoting travel or scheduling a visit outside its core service area.
Boston and nearby communities
Geographic code · In service
617 at a glance
- Region
- Boston and nearby communities
- Time zone
- Eastern Time
- In service since
- 01-Jan-1947
- Overlay arrangement
- 617/857
Numbering details checked September 21, 2026 against the NANPA database. See the official area-code maps for boundaries.
Questions about 617
Are 617 and 857 the same area?
857 overlays the 617 region. Both can be Boston-area numbers. Neither prefix identifies a particular neighborhood, business, or device type.
Is a 617 call safe to answer?
The 617 prefix identifies a numbering region, not a caller's identity or trustworthiness. Verify an unexpected request by contacting the organization through a number you already know.
Can I get a 617 business number?
Search the available numbers in VeraDial. Inventory changes, so a 617 number is not guaranteed. You can also keep your current carrier number and forward voice calls to a VeraDial line; existing texts stay with your carrier.
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