Prefix 617-938 — Boston, MA

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

Area code
617
Prefix (NXX)
938
Rate center
Boston
State
Massachusetts
Time zone
Eastern
Code holder
LEVEL 3 COMMUNICATIONS, LLC - MA
OCN
4018
Pooled
Yes (thousands-block pooling)
Assigned
2004-08-04
LATA
128

Numbers in the 617-938 prefix are registered to the Boston rate center in MA, inside area code 617. The prefix is the second block of a ten-digit US number (617-938-XXXX) and pins the number to a billing locality.

NANPA's central-office code records list LEVEL 3 COMMUNICATIONS, LLC - MA (OCN 4018) as the code holder, assigned August 4, 2004. Because 617-938 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

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.

Spoofing means this prefix on your screen doesn't guarantee a Boston caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

Prefixes adjacent to 617-938
PrefixRate centerCode holder
617-935 Brookline OMNIPOINT MIAMI E LICENSE, LLC
617-936 Boston PAETEC ITEL, LLC
617-937 Boston VERIZON NEW ENGLAND INC.
617-939 Boston CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA
617-941 Somerville MCIMETRO ACCESS TRANSMISSION SERVICES LLC
617-942 Jamaica Plain TC SYSTEMS, INC.

FAQ

Where is 617-938 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 617-938 numbers?

LEVEL 3 COMMUNICATIONS, LLC - MA 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 617-938 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.