Prefix 314-557 — Ladue, MO
The 314-557 prefix belongs to area code 314 and is anchored to the Ladue rate center (MO). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.
Ladue is part of the St. Louis, MO-IL Metropolitan Statistical Area. For routing purposes it sits in LATA 520. Numbers here keep Central time.
Code-holder of record: NUSO, LLC (OCN 732J), assigned February 10, 2023. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 314-557 numbers may be served by different companies.
Caller ID showing 314-557 is not proof the call came from Ladue: 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 |
|---|---|---|
| 314-553 | Saint Louis | SOUTHWESTERN BELL |
| 314-554 | Saint Louis | SOUTHWESTERN BELL |
| 314-556 | Saint Louis | T-MOBILE USA, INC. |
| 314-558 | Saint Louis | LEVEL 3 COMMUNICATIONS, LLC - MO |
| 314-559 | Saint Louis | AMERICAN MESSAGING SERVICES, LLC |
| 314-560 | Kirkwood | NEW CINGULAR WIRELESS PCS, LLC - IL |
FAQ
Where is 314-557 located?
The prefix is assigned to the Ladue rate center in MO, area code 314. It is part of the St. Louis, MO-IL Metropolitan Statistical Area.
Which company owns 314-557 numbers?
NUSO, 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 314-557 safe to answer?
The prefix itself says nothing about the caller. Legitimate Ladue businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.