| 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 |
|---|---|---|---|
| 503-200 | Multnomah | Portland, OR | New Cingular Wireless PCS |
| 503-201 | Multnomah | Portland, OR | Cellco Partnership DBA Verizon Wireless |
| 503-202 | Multnomah | Portland, OR | Usa Mobility Wireless |
| 503-203 | Washington | Portland, OR | Qwest Corporation |
| 503-204 | Multnomah | Portland, OR | Usa Mobility Wireless |
| 503-205 | Multnomah | Portland, OR | Mcimetro Access Transmission Services LLC |
| 503-206 | Multnomah | Portland, OR | Zayo Group |
| 503-207 | Multnomah | Portland, OR | Mcimetro Access Transmission Services LLC |
| 503-208 | Multnomah | Portland, OR | Cricket Communications |
| 503-209 | Multnomah | Portland, OR | Sprint Spectrum L.p. |
| 503-210 | Multnomah | Portland, OR | Electric Lightwave DBA Integra Telecom |
| 503-212 | Multnomah | Portland, OR | Electric Lightwave DBA Integra Telecom |
| 503-213 | Multnomah | Portland, OR | Electric Lightwave DBA Integra Telecom |
| 503-214 | Multnomah | Portland, OR | Electric Lightwave DBA Integra Telecom |
| 503-215 | Multnomah | Portland, OR | Qwest Corporation |
| 503-216 | Washington | Portland, OR | Qwest Corporation |
| 503-217 | Washington | Sherwood, OR | Electric Lightwave DBA Integra Telecom |
| 503-218 | Washington | Tualatin, OR | Electric Lightwave DBA Integra Telecom |
| 503-219 | Multnomah | Portland, OR | Qwest Corporation |
| 503-220 | 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.