Prefix 617-885 — Boston, MA

NANPA CO code assignment, current as of July 28, 2026.

The 617-885 prefix belongs to area code 617 and is anchored to the Boston rate center (MA). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Boston 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 MOBILESPHERE LLC (OCN 487K) as the code holder, assigned October 18, 2023. Because 617-885 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

Caller ID showing 617-885 is not proof the call came from Boston: 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

FAQ

Where is 617-885 located?

The prefix is assigned to the Boston rate center in MA, area code 617. It is part of the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area.

Which company owns 617-885 numbers?

MOBILESPHERE LLC 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 617-885 safe to answer?

The prefix itself says nothing about the caller. Legitimate Boston businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.