| 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 |
|---|---|---|---|
| 503-319 | Portland | Washington | Wireless |
| 503-675 | Lake Oswego | Clackamas | Landline |
| 503-232 | Portland | Multnomah | Landline |
| 503-961 | Portland | Multnomah | Landline |
| 503-690 | Beaverton | Washington | Landline |
| 503-345 | Hebo | Tillamook | Landline |
| 503-548 | Portland | Multnomah | Landline |
| 503-556 | Rainier | Columbia | Landline |
| 503-963 | Portland | Multnomah | Landline |
| 503-997 | Portland | Washington | Wireless |
| 503-617 | Beaverton | Washington | Landline |
| 503-676 | Gresham | Multnomah | Landline |
| 503-806 | Portland | Washington | Wireless |
| 503-279 | Portland | Multnomah | Landline |
| 503-289 | Portland | Multnomah | Landline |
| 503-798 | Salem | Marion | Landline |
| 503-260 | Portland | Washington | Wireless |
| 503-475 | Portland | Washington | Wireless |
| 503-983 | Portland | Washington | Wireless |
| 503-816 | Portland | Washington | Wireless |