Prefix 503-400 — Salem, OR
Numbers in the 503-400 prefix are registered to the Salem rate center in OR, inside area code 503. The prefix is the second block of a ten-digit US number (503-400-XXXX) and pins the number to a billing locality.
The assigned code holder is LEVEL 3 COMMUNICATIONS, LLC - OR, operating company number 3234, assigned May 10, 2007. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
The serving LATA is 672. Local time follows the Pacific zone.
Spoofing means this prefix on your screen doesn't guarantee a Salem caller. Verify independently before trusting a request for money or data.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 503-397 | Saint Helens | QWEST CORPORATION |
| 503-398 | Beaver | UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR |
| 503-399 | Salem | QWEST CORPORATION |
| 503-401 | Portland | QWEST CORPORATION |
| 503-402 | Portland | QWEST CORPORATION |
| 503-403 | Beaverton | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
FAQ
Where is 503-400 located?
The prefix is assigned to the Salem rate center in OR, area code 503.
Which company owns 503-400 numbers?
LEVEL 3 COMMUNICATIONS, LLC - OR 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 503-400 safe to answer?
The prefix itself says nothing about the caller. Legitimate Salem businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.