Prefix 617-201 — Cambridge, MA

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

A phone number starting 617-201 was issued in the Cambridge rate center of MA — part of area code 617.

NANPA's central-office code records list OMNIPOINT MIAMI E LICENSE, LLC (OCN 6889) as the code holder, assigned February 14, 2001. Because 617-201 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

A scammer can display 617-201 without ever touching MA. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.

Cambridge 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.

Neighboring prefixes

FAQ

Where is 617-201 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 617-201 numbers?

OMNIPOINT MIAMI E LICENSE, 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 617-201 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.