| 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 |
|---|---|---|---|
| 503-402 | Multnomah | Portland, OR | Qwest Corporation |
| 503-403 | Multnomah | Portland, OR | Mcimetro Access Transmission Services LLC |
| 503-404 | Multnomah | Portland, OR | Mcimetro Access Transmission Services LLC |
| 503-405 | Multnomah | Portland, OR | Mcimetro Access Transmission Services LLC |
| 503-406 | Multnomah | Portland, OR | Level 3 Communications |
| 503-407 | Multnomah | Portland, OR | Cellco Partnership DBA Verizon Wireless |
| 503-408 | Multnomah | Portland, OR | Qwest Corporation |
| 503-409 | Marion | Salem, OR | T-mobile Usa |
| 503-410 | Columbia | St Helens, OR | Sprint Spectrum L.p. |
| 503-412 | Multnomah | Portland, OR | Qwest Corporation |
| 503-413 | Multnomah | Portland, OR | Qwest Corporation |
| 503-414 | Multnomah | Portland, OR | Qwest Corporation |
| 503-415 | Multnomah | Portland, OR | Qwest Corporation |
| 503-416 | Multnomah | Portland, OR | Tw Telecom Of Oregon LLC |
| 503-417 | Multnomah | Portland, OR | Qwest Corporation |
| 503-418 | Multnomah | Portland, OR | Qwest Corporation |
| 503-419 | Washington | Beaverton, OR | Xo Oregon |
| 503-420 | Polk | Dallas, OR | Sprint Spectrum L.p. |
| 503-421 | Multnomah | Portland, OR | Sprint Spectrum L.p. |
| 503-422 | Multnomah | Portland, OR | Sprint Spectrum L.p. |
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.