Prefix 503-354 — Tillamook, OR
Numbers in the 503-354 prefix are registered to the Tillamook rate center in OR, inside area code 503. The prefix is the second block of a ten-digit US number (503-354-XXXX) and pins the number to a billing locality.
NANPA's central-office code records list LEVEL 3 COMMUNICATIONS, LLC - OR (OCN 3234) as the code holder, assigned September 20, 2002. Because 503-354 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
The serving LATA is 672. Local time follows the Pacific zone.
Spoofing means this prefix on your screen doesn't guarantee a Tillamook caller. Verify independently before trusting a request for money or data.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 503-351 | Portland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR |
| 503-352 | Beaverton | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
| 503-353 | Clackamas | QWEST CORPORATION |
| 503-355 | Rockaway | UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR |
| 503-356 | Beaverton | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER |
| 503-357 | Beaverton | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER |
FAQ
Where is 503-354 located?
The prefix is assigned to the Tillamook rate center in OR, area code 503.
Which company owns 503-354 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 503-354 safe to answer?
The prefix itself says nothing about the caller. Legitimate Tillamook businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.