Prefix 503-343 — Clackamas, OR
Numbers in the 503-343 prefix are registered to the Clackamas rate center in OR, inside area code 503. The prefix is the second block of a ten-digit US number (503-343-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. Because 503-343 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
The rate center lies in the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area. The serving LATA is 672. Local time follows the Pacific zone.
Spoofing means this prefix on your screen doesn't guarantee a Clackamas caller. Verify independently before trusting a request for money or data.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 503-340 | Portland | QWEST CORPORATION |
| 503-341 | Portland | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR |
| 503-342 | Clackamas | LEVEL 3 COMMUNICATIONS, LLC - OR |
| 503-344 | Clackamas | LEVEL 3 COMMUNICATIONS, LLC - OR |
| 503-345 | Portland | LEVEL 3 COMMUNICATIONS, LLC - OR |
| 503-346 | Portland | QWEST CORPORATION |
FAQ
Where is 503-343 located?
The prefix is assigned to the Clackamas rate center in OR, area code 503. It is part of the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area.
Which company owns 503-343 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 503-343 safe to answer?
The prefix itself says nothing about the caller. Legitimate Clackamas businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.