| 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 |
|---|---|---|---|
| 503-598 | Beaverton | Washington | Landline |
| 503-705 | Portland | Washington | Wireless |
| 503-220 | Portland | Multnomah | Landline |
| 503-645 | Beaverton | Washington | Landline |
| 503-895 | Welches | Clackamas | Landline |
| 503-887 | Portland | Washington | Wireless |
| 503-877 | Detroit | Marion | Landline |
| 503-692 | Tualatin | Washington | Landline |
| 503-778 | Portland | Multnomah | Landline |
| 503-847 | Portland | Multnomah | Wireless |
| 503-459 | Portland | Multnomah | Landline |
| 503-248 | Portland | Multnomah | Landline |
| 503-239 | Portland | Multnomah | Landline |
| 503-944 | Portland | Multnomah | Landline |
| 503-594 | West Linn | Clackamas | Landline |
| 503-748 | Beaverton | Washington | Landline |
| 503-765 | Portland | Multnomah | Landline |
| 503-201 | Portland | Washington | Wireless |
| 503-768 | Portland | Multnomah | Landline |
| 503-948 | Portland | Multnomah | Landline |