Prefix 314-556 — Saint Louis, MO
- Area code
- 314
- Prefix (NXX)
- 556
- Rate center
- Saint Louis
- State
- Missouri
- Time zone
- Central
- Code holder
- T-MOBILE USA, INC.
- OCN
- 6529
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2006-07-25
- LATA
- 520
314-556 identifies a block of numbers in Saint Louis, MO, within the 314 area code. Every US prefix is tied to exactly one rate center; this one is Saint Louis.
The rate center lies in the St. Louis, MO-IL Metropolitan Statistical Area. The serving LATA is 520. Local time follows the Central zone.
Treat the on-screen number as a hint, not evidence — 314-556 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 T-MOBILE USA, INC. (OCN 6529) as the code holder, assigned July 25, 2006. Because 314-556 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 |
|---|---|---|
| 314-552 | Saint Louis | SOUTHWESTERN BELL |
| 314-553 | Saint Louis | SOUTHWESTERN BELL |
| 314-554 | Saint Louis | SOUTHWESTERN BELL |
| 314-557 | Ladue | NUSO, LLC |
| 314-558 | Saint Louis | LEVEL 3 COMMUNICATIONS, LLC - MO |
| 314-559 | Saint Louis | AMERICAN MESSAGING SERVICES, LLC |
FAQ
Where is 314-556 located?
The prefix is assigned to the Saint Louis rate center in MO, area code 314. It is part of the St. Louis, MO-IL Metropolitan Statistical Area.
Which company owns 314-556 numbers?
T-MOBILE USA, INC. 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 314-556 safe to answer?
The prefix itself says nothing about the caller. Legitimate Saint Louis businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.