| Frequency | Use | Hours/Days of Operation |
|---|---|---|
| Washington Dulles International Airport | ||
| 120.450 | Potomac Approach (241-330) | continuous |
| 124.650 | Potomac Approach (091-240) | |
| 126.100 | Potomac Approach (331-090) | |
| 125.050 | Potomac Departure (300-120) | |
| 126.650 | Potomac Departure (121-299) | |
| 120.100 | Tower (01R/19L) | |
| 128.425 | Tower (01L/19R, 12/30) | |
| Ronald Reagan Washington National Airport | ||
| 119.850 | Potomac Approach (west) | continuous |
| 124.200 | Potomac Approach (east) | |
| 128.350 | Potomac Approach (southeast) | |
| 118.950 | Potomac Departure (west) | |
| 121.050 | ||
| 125.650 | Potomac Departure (east) | |
| 126.550 | ||
| 119.100 | Tower | |
| 120.750 | Tower (helicopters) | |