Prefix 617-270 — Chelsea, MA
The 617-270 prefix belongs to area code 617 and is anchored to the Chelsea rate center (MA). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.
Chelsea is part of the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area. For routing purposes it sits in LATA 128. Numbers here keep Eastern time.
NANPA's central-office code records list METROPCS, INC. (OCN 5562) as the code holder, assigned February 14, 2001. Because 617-270 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
Caller ID showing 617-270 is not proof the call came from Chelsea: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 617-267 | Boston | VERIZON NEW ENGLAND INC. |
| 617-268 | South Boston | VERIZON NEW ENGLAND INC. |
| 617-269 | South Boston | VERIZON NEW ENGLAND INC. |
| 617-271 | East Boston | METROPCS, INC. |
| 617-272 | Hyde Park | ONVOY, LLC - MA |
| 617-273 | Milton | LEVEL 3 COMMUNICATIONS, LLC - MA |
FAQ
Where is 617-270 located?
The prefix is assigned to the Chelsea rate center in MA, area code 617. It is part of the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area.
Which company owns 617-270 numbers?
METROPCS, INC. holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.
Is a call from 617-270 safe to answer?
The prefix itself says nothing about the caller. Legitimate Chelsea businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.