| 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 |
|---|---|---|---|
| 503-851 | Marion | Salem, OR | T-mobile Usa |
| 503-852 | Yamhill | Carlton, OR | United Telephone-northwest-or DBA Centurylink |
| 503-853 | Multnomah | Portland, OR | Cellco Partnership DBA Verizon Wireless |
| 503-854 | Marion | Detroit, OR | Frontier Communications Northwest |
| 503-855 | Washington | Beaverton, OR | Tw Telecom Of Oregon LLC |
| 503-856 | Marion | Salem, OR | Qwest Corporation |
| 503-857 | Yamhill | Mcminnville, OR | Tw Telecom Of Oregon LLC |
| 503-858 | Washington | Beaverton, OR | Tw Telecom Of Oregon LLC |
| 503-859 | Linn | Lyons, OR | Peoples Tel Co |
| 503-860 | Multnomah | Portland, OR | New Cingular Wireless PCS |
| 503-861 | Clatsop | Warrenton, OR | Qwest Corporation |
| 503-862 | Washington | Beaverton, OR | Tw Telecom Of Oregon LLC |
| 503-863 | Multnomah | Portland, OR | New Cingular Wireless PCS |
| 503-864 | Yamhill | Dayton, OR | Frontier Communications Northwest |
| 503-865 | Multnomah | Portland, OR | Qwest Corporation |
| 503-866 | Multnomah | Portland, OR | New Cingular Wireless PCS |
| 503-867 | Multnomah | Portland, OR | Cellco Partnership DBA Verizon Wireless |
| 503-868 | Yamhill | Grand Island, OR | Frontier Communications Northwest |
| 503-869 | Multnomah | Portland, OR | New Cingular Wireless PCS |
| 503-870 | Multnomah | Portland, OR | Usa Mobility Wireless |
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.