Prefix 313-307 — Detroit Zone 04, MI
- Area code
- 313
- Prefix (NXX)
- 307
- Rate center
- Detroit Zone 04
- State
- Michigan
- Time zone
- Eastern
- Code holder
- ONVOY, LLCV - MI
- OCN
- 543C
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2013-09-19
- LATA
- 340
The 313-307 prefix belongs to area code 313 and is anchored to the Detroit Zone 04 rate center (MI). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.
Detroit Zone 04 is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area. For routing purposes it sits in LATA 340. Numbers here keep Eastern time.
The assigned code holder is ONVOY, LLCV - MI, operating company number 543C, assigned September 19, 2013. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
Caller ID showing 313-307 is not proof the call came from Detroit Zone 04: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 313-304 | Detroit Zone 05 | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
| 313-305 | Detroit Zone 03 | PAETEC ITEL, LLC |
| 313-306 | Detroit Zone 04 | BANDWIDTH.COM CLEC, LLC - MI |
| 313-308 | Detroit Zone 02 | PAETEC ITEL, LLC |
| 313-309 | Detroit Zone 01 | PAETEC ITEL, LLC |
| 313-310 | Detroit Zone 05 | NEW CINGULAR WIRELESS PCS, LLC - IL |
FAQ
Where is 313-307 located?
The prefix is assigned to the Detroit Zone 04 rate center in MI, area code 313. It is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area.
Which company owns 313-307 numbers?
ONVOY, LLCV - MI 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 313-307 safe to answer?
The prefix itself says nothing about the caller. Legitimate Detroit Zone 04 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.