Prefix 313-403 — Detroit Zone 06, MI
- Area code
- 313
- Prefix (NXX)
- 403
- Rate center
- Detroit Zone 06
- State
- Michigan
- Time zone
- Eastern
- Code holder
- OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC
- OCN
- 2964
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2014-10-23
- LATA
- 340
313-403 identifies a block of numbers in Detroit Zone 06, MI, within the 313 area code. Every US prefix is tied to exactly one rate center; this one is Detroit Zone 06.
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 — 313-403 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.
NANPA's central-office code records list OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (OCN 2964) as the code holder, assigned October 23, 2014. Because 313-403 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 313-400 | Detroit Zone 05 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
| 313-401 | Detroit Zone 05 | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 313-402 | Detroit Zone 05 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
| 313-404 | Detroit Zone 05 | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 313-405 | Detroit Zone 05 | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 313-406 | Detroit Zone 06 | COMCAST IP PHONE, LLC |
FAQ
Where is 313-403 located?
The prefix is assigned to the Detroit Zone 06 rate center in MI, area code 313. It is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area.
Which company owns 313-403 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 313-403 safe to answer?
The prefix itself says nothing about the caller. Legitimate Detroit Zone 06 businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.