Prefix 617-280 — Cambridge, MA
617-280 identifies a block of numbers in Cambridge, MA, within the 617 area code. Every US prefix is tied to exactly one rate center; this one is Cambridge.
The rate center lies in the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area. The serving LATA is 128. Local time follows the Eastern zone.
Treat the on-screen number as a hint, not evidence — 617-280 can be spoofed like any US prefix. If a call feels off, verify through an official callback number and file a complaint with the FCC or FTC.
The assigned code holder is NEP, LLC, operating company number 174A, assigned September 29, 2003. No thousands-block pooling applies here; the whole block belongs to the code holder unless numbers were ported out.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 617-277 | Brookline | VERIZON NEW ENGLAND INC. |
| 617-278 | Brookline | VERIZON NEW ENGLAND INC. |
| 617-279 | Boston | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 617-281 | Waltham | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 617-282 | Dorchester | VERIZON NEW ENGLAND INC. |
| 617-283 | Boston | NEW CINGULAR WIRELESS PCS, LLC - DC |
FAQ
Where is 617-280 located?
The prefix is assigned to the Cambridge rate center in MA, area code 617. It is part of the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area.
Which company owns 617-280 numbers?
NEP, LLC holds the code. Individual numbers may still be ported to other providers.
Is a call from 617-280 safe to answer?
The prefix itself says nothing about the caller. Legitimate Cambridge businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.