Prefix 313-356 — Detroit Zone 03, MI

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

Area code
313
Prefix (NXX)
356
Rate center
Detroit Zone 03
State
Michigan
Time zone
Eastern
Code holder
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
OCN
2964
Pooled
Yes (thousands-block pooling)
Assigned
2016-06-14
LATA
340

A phone number starting 313-356 was issued in the Detroit Zone 03 rate center of MI — part of area code 313.

The assigned code holder is OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC, operating company number 2964, assigned June 14, 2016. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

A scammer can display 313-356 without ever touching MI. 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.

Detroit Zone 03 is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area. For routing purposes it sits in LATA 340. Numbers here keep Eastern time.

Neighboring prefixes

Prefixes adjacent to 313-356
PrefixRate centerCode holder
313-353 Detroit Zone 05 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
313-354 Detroit Zone 05 NEW CINGULAR WIRELESS PCS, LLC - IL
313-355 Detroit Zone 01 BANDWIDTH.COM CLEC, LLC - MI
313-357 Detroit Zone 06 PAETEC ITEL, LLC
313-358 Detroit Zone 06 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
313-359 Detroit Zone 06 MICHIGAN BELL TEL CO

FAQ

Where is 313-356 located?

The prefix is assigned to the Detroit Zone 03 rate center in MI, area code 313. It is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area.

Which company owns 313-356 numbers?

OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, 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 313-356 safe to answer?

The prefix itself says nothing about the caller. Legitimate Detroit Zone 03 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.