Prefix 503-300 — Bay City, OR
The 503-300 prefix belongs to area code 503 and is anchored to the Bay City rate center (OR). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.
For routing purposes it sits in LATA 672. Numbers here keep Pacific time.
The assigned code holder is CHARTER IP ENABLED SERVICES, LLC, operating company number 792K, assigned February 12, 2008. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
Caller ID showing 503-300 is not proof the call came from Bay City: 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 |
|---|---|---|
| 503-297 | Portland | QWEST CORPORATION |
| 503-298 | Astoria | LEVEL 3 COMMUNICATIONS, LLC - OR |
| 503-299 | Portland | QWEST CORPORATION |
| 503-301 | Portland | SPOK, INC. |
| 503-302 | Salem | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR |
| 503-303 | Clackamas | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
FAQ
Where is 503-300 located?
The prefix is assigned to the Bay City rate center in OR, area code 503.
Which company owns 503-300 numbers?
CHARTER IP ENABLED SERVICES, 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 503-300 safe to answer?
The prefix itself says nothing about the caller. Legitimate Bay City businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.