Prefix 313-379 — Detroit Zone 01, MI

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

Area code
313
Prefix (NXX)
379
Rate center
Detroit Zone 01
State
Michigan
Time zone
Eastern
Code holder
CLEAR RATE COMMUNICATIONS, LLC
OCN
046L
Pooled
Yes (thousands-block pooling)
Assigned
2017-02-22
LATA
340

313-379 identifies a block of numbers in Detroit Zone 01, MI, within the 313 area code. Every US prefix is tied to exactly one rate center; this one is Detroit Zone 01.

The rate center lies in the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area. The serving LATA is 340. Local time follows the Eastern zone.

Treat the on-screen number as a hint, not evidence — 313-379 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 CLEAR RATE COMMUNICATIONS, LLC, operating company number 046L, assigned February 22, 2017. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

Neighboring prefixes

Prefixes adjacent to 313-379
PrefixRate centerCode holder
313-376 Detroit Zone 05 SPOK, INC.
313-377 Detroit Zone 06 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
313-378 Detroit Zone 05 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI
313-380 Detroit Zone 06 BANDWIDTH.COM CLEC, LLC - MI
313-381 Detroit Zone 06 MICHIGAN BELL TEL CO
313-382 Detroit Zone 06 MICHIGAN BELL TEL CO

FAQ

Where is 313-379 located?

The prefix is assigned to the Detroit Zone 01 rate center in MI, area code 313. It is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area.

Which company owns 313-379 numbers?

CLEAR RATE COMMUNICATIONS, 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 313-379 safe to answer?

The prefix itself says nothing about the caller. Legitimate Detroit Zone 01 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.