| 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 |
|---|---|---|---|
| 503-463 | Marion | Salem, OR | Qwest Corporation |
| 503-464 | Multnomah | Portland, OR | Qwest Corporation |
| 503-465 | Multnomah | Gresham, OR | Frontier Communications Northwest |
| 503-466 | Washington | Beaverton, OR | Frontier Communications Northwest |
| 503-467 | Multnomah | Portland, OR | Electric Lightwave DBA Integra Telecom |
| 503-468 | Clatsop | Astoria, OR | Level 3 Communications |
| 503-469 | Washington | Beaverton, OR | Frontier Communications Northwest |
| 503-470 | Clatsop | Seaside, OR | T-mobile Usa |
| 503-471 | Multnomah | Portland, OR | Qwest Corporation |
| 503-472 | Yamhill | Mcminnville, OR | Frontier Communications Northwest |
| 503-473 | Multnomah | Portland, OR | Mcimetro Access Transmission Services LLC |
| 503-474 | Yamhill | Mcminnville, OR | Frontier Communications Northwest |
| 503-475 | Multnomah | Portland, OR | New Cingular Wireless PCS |
| 503-476 | Yamhill | Newberg, OR | Integra Telecom Of Oregon |
| 503-477 | Multnomah | Portland, OR | Cellco Partnership DBA Verizon Wireless |
| 503-478 | Multnomah | Portland, OR | Qwest Corporation |
| 503-479 | Multnomah | Portland, OR | Tw Telecom Of Oregon LLC |
| 503-480 | Marion | Salem, OR | Integra Telecom Of Oregon |
| 503-481 | Multnomah | Portland, OR | T-mobile Usa |
| 503-482 | Multnomah | Portland, OR | Tw Telecom Of Oregon LLC |
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.