Underwood Area Code - Washington, Skamania, WA
| City | Underwood |
| State | Washington |
| Zip Code | 98651 |
| Area Code | 509 |
| County | Skamania |
| State Code | WA |
| Time Zone | PST |
| Longitude | -121.5974 |
| Latitude | 45.7409 |
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