Prefix 313-509 — Detroit Zone 02, MI

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

Area code
313
Prefix (NXX)
509
Rate center
Detroit Zone 02
State
Michigan
Time zone
Eastern
Code holder
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
OCN
2964
Pooled
Yes (thousands-block pooling)
Assigned
2016-01-13
LATA
340

A phone number starting 313-509 was issued in the Detroit Zone 02 rate center of MI — part of area code 313.

The assigned code holder is OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC, operating company number 2964, assigned January 13, 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 313-509 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 02 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 313-509
PrefixRate centerCode holder
313-506 Detroit Zone 05 NEW CINGULAR WIRELESS PCS, LLC - IL
313-507 Detroit Zone 05 MICHIGAN BELL TEL CO
313-508 Detroit Zone 05 MICHIGAN BELL TEL CO
313-510 Detroit Zone 05 NEW CINGULAR WIRELESS PCS, LLC - IL
313-512 Detroit Zone 04 LEVEL 3 COMMUNICATIONS, LLC - MI
313-513 Detroit Zone 01 ONVOY, LLCV - MI

FAQ

Where is 313-509 located?

The prefix is assigned to the Detroit Zone 02 rate center in MI, area code 313. It is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area.

Which company owns 313-509 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 313-509 safe to answer?

The prefix itself says nothing about the caller. Legitimate Detroit Zone 02 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.