| District of Oregon area codes: 503 | |
|---|---|
| Country | United States |
| State/Province | Oregon |
| Major City | Portland |
| Time Zone | Pacific (UTC-08:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 503-382 | Washington | Tigard, OR | Teleport Communications America |
| 503-383 | Marion | Salem, OR | Teleport Communications America |
| 503-384 | Washington | Portland, OR | Qwest Corporation |
| 503-385 | Marion | Salem, OR | Teleport Communications America |
| 503-386 | Clatsop | Astoria, OR | Zayo Group |
| 503-387 | Washington | Tigard, OR | Teleport Communications America |
| 503-388 | Multnomah | Portland, OR | Cricket Communications |
| 503-389 | Washington | Tigard, OR | Xo Oregon |
| 503-390 | Marion | Salem, OR | Qwest Corporation |
| 503-391 | Marion | Salem, OR | Qwest Corporation |
| 503-392 | Tillamook | Cloverdale, OR | United Telephone-northwest-or DBA Centurylink |
| 503-393 | Marion | Salem, OR | Qwest Corporation |
| 503-394 | Linn | Scio, OR | Scio Mutual Telephone Association |
| 503-395 | Columbia | Rainier, OR | Teleport Communications America |
| 503-396 | Columbia | St Helens, OR | Cellco Partnership DBA Verizon Wireless |
| 503-397 | Columbia | St Helens, OR | Qwest Corporation |
| 503-398 | Tillamook | Beaver, OR | United Telephone-northwest-or DBA Centurylink |
| 503-399 | Marion | Salem, OR | Qwest Corporation |
| 503-400 | Marion | Salem, OR | Radix Networks LLC |
| 503-401 | Multnomah | Portland, OR | Qwest Corporation |
There are 784 prefixes, In the code area, the major cities are Aloha, OR;Beaverton, OR;Gresham, OR;Hillsboro, OR;. The major city is Portland.