Prefix 313-437 — Detroit Zone 04, MI
- Area code
- 313
- Prefix (NXX)
- 437
- Rate center
- Detroit Zone 04
- State
- Michigan
- Time zone
- Eastern
- Code holder
- TELEPORT COMMUNICATIONS AMERICA, LLC - MI
- OCN
- 770E
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2010-03-19
- LATA
- 340
The 313-437 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.
Code-holder of record: TELEPORT COMMUNICATIONS AMERICA, LLC - MI (OCN 770E), assigned March 19, 2010. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 313-437 numbers may be served by different companies.
Caller ID showing 313-437 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 |
|---|---|---|
| 313-434 | Detroit Zone 05 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
| 313-435 | Detroit Zone 06 | ONVOY, LLCV - MI |
| 313-436 | Detroit Zone 06 | MICHIGAN BELL TEL CO |
| 313-438 | Detroit Zone 06 | MICHIGAN BELL TEL CO |
| 313-439 | Detroit Zone 05 | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 313-440 | Detroit Zone 05 | SPOK, INC. |
FAQ
Where is 313-437 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 313-437 numbers?
TELEPORT COMMUNICATIONS AMERICA, LLC - 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 313-437 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.