| 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 |
|---|---|---|---|
| 503-443 | Washington | Beaverton, OR | Frontier Communications Northwest |
| 503-444 | Washington | Beaverton, OR | Electric Lightwave DBA Integra Telecom |
| 503-445 | Washington | Beaverton, OR | Integra Telecom Of Oregon |
| 503-446 | Marion | Silverton, OR | Cricket Communications |
| 503-447 | Washington | Tigard, OR | Teleport Communications America |
| 503-448 | Marion | Aumsville, OR | Scs Communications And Security |
| 503-449 | Washington | Portland, OR | Sprint Spectrum L.p. |
| 503-450 | Multnomah | Portland, OR | Qwest Corporation |
| 503-451 | Washington | Tigard, OR | Teleport Communications America |
| 503-452 | Multnomah | Portland, OR | Qwest Corporation |
| 503-453 | Washington | Tigard, OR | Frontier Communications Northwest |
| 503-454 | Washington | Tigard, OR | Teleport Communications America |
| 503-455 | Columbia | Clatskanie, OR | Qwest Corporation |
| 503-456 | Washington | Beaverton, OR | Mcimetro Access Transmission Services LLC |
| 503-457 | Tillamook | Tillamook, OR | Cellco Partnership DBA Verizon Wireless |
| 503-458 | Clatsop | Astoria, OR | Centurytel Of Oregon |
| 503-459 | Multnomah | Portland, OR | Tw Telecom Of Oregon LLC |
| 503-460 | Multnomah | Portland, OR | Qwest Corporation |
| 503-461 | Clatsop | Seaside, OR | Universal Telecommunications |
| 503-462 | Washington | Tigard, OR | Teleport Communications America |
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.