| General Information about Area Code 503 | |
|---|---|
| Country | United States |
| State / Province / Territory | Oregon |
| Major City | Portland |
| Time Zone | Pacific (UTC-08:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 503-303 | Portland | Multnomah | Landline |
| 503-833 | Portland | Multnomah | Landline |
| 503-440 | Seaside | Clatsop | Wireless |
| 503-931 | Salem | Marion | Wireless |
| 503-547 | Hillsboro | Washington | Landline |
| 503-878 | Portland | Multnomah | Landline |
| 503-857 | Mcminnville | Yamhill | Landline |
| 503-340 | Portland | Multnomah | Landline |
| 503-930 | Salem | Marion | Wireless |
| 503-864 | Dayton | Yamhill | Landline |
| 503-712 | Hillsboro | Washington | Landline |
| 503-329 | Portland | Washington | Wireless |
| 503-668 | West Linn | Clackamas | Landline |
| 503-521 | Beaverton | Washington | Landline |
| 503-969 | Portland | Washington | Wireless |
| 503-517 | Beaverton | Washington | Landline |
| 503-222 | Portland | Multnomah | Landline |
| 503-454 | Portland | Washington | Landline |
| 503-894 | Portland | Multnomah | Wireless |
| 503-244 | Portland | Multnomah | Landline |