| 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 |
|---|---|---|---|
| 503-353 | Clackamas | Clackamas | Landline |
| 503-960 | Portland | Multnomah | Wireless |
| 503-543 | Scappoose | Columbia | Landline |
| 503-587 | Salem | Marion | Landline |
| 503-697 | Lake Oswego | Clackamas | Landline |
| 503-901 | Portland | Washington | Wireless |
| 503-941 | Beaverton | Washington | Landline |
| 503-437 | Mcminnville | Yamhill | Wireless |
| 503-993 | Portland | Washington | Wireless |
| 503-805 | Portland | Washington | Wireless |
| 503-518 | Beavercreek | Clackamas | Landline |
| 503-277 | Beaverton | Washington | Landline |
| 503-885 | Tualatin | Washington | Landline |
| 503-326 | Portland | Multnomah | Landline |
| 503-832 | Portland | Multnomah | Landline |
| 503-916 | Portland | Multnomah | Landline |
| 503-975 | Portland | Washington | Wireless |
| 503-431 | Beaverton | Washington | Landline |
| 503-724 | Portland | Multnomah | Wireless |
| 503-520 | Beaverton | Washington | Landline |