| Frequency | Use | Hours/Days of Operation |
|---|---|---|
| Lee Airport, Annapolis | ||
| 119.700 | Potomac Approach/Departure | continuous |
| 122.900 | General Radio | |
| Baltimore-Washington International Airport, Baltimore | ||
| 119.000 | Potomac Approach/Departure (020-100) | continuous |
| 119.700 | Potomac Approach/Departure (131-180) | |
| 124.550 | Potomac Approach/Departure (101-130) | |
| 128.700 | Potomac Approach/Departure (181-019) | |
| 119.400 | Tower | |
| Martin State Airport, Baltimore | ||
| 119.000 | Potomac Approach/Departure | continuous |
| 121.300 | Tower | 0600-2200 Daily |
| Cambridge-Dorchester Airport, Cambridge | ||
| 127.950 | Patuxent Approach/Departure | 0700-2300 Daily |
| 132.550 | Approach/Departure - Washington Center | 2301-0659 Daily |
| 122.700 | General Radio | |
| Harford County Airport, Churchville | ||
| 126.750 | Potomac Approach/Departure | continuous |
| 122.800 | General Radio | |
| College Park Airport, College Park | ||
| 119.850 | Potomac Approach/Departure | continuous |
| 122.975 | General Radio | |
| Crisfield Municipal Airport, Crisfield | ||
| 127.950 | Patuxent Approach/Departure | 0700-2300 Daily |
| 132.550 | Approach/Departure - Washington Center | 2301-0659 Daily |
| 122.800 | General Radio | |
| Greater Cumberland Regional Airport, Cumberland | ||
| 124.400 | Approach/Departure - Cleveland Center | continuous |
| 122.800 | General Radio | |
| Easton/Newnam Field Airport, Easton | ||
| 124.550 | Potomac Approach/Departure | continuous |
| 122.950 | General Radio | |
| Cecil County Airport, Elkton | ||
| 118.350 | Potomac Approach/Departure | continuous |
| 122.800 | General Radio | |
| Tipton Airport, Fort Meade (Odenton) | ||
| 119.700 | Potomac Approach/Departure | continuous |
| 123.050 | General Radio | |
| Frederick Municipal Airport, Frederick | ||
| 126.750 | Potomac Approach/Departure | continuous |
| 122.725 | General Radio | |
| Potomac Airfield, Friendly | ||
| 125.650 | Potomac Approach/Departure | continuous |
| 122.800 | General Radio | |
| Montgomery County Airpark, Gaithersburg | ||
| 128.700 | Potomac Approach/Departure | continuous |
| 123.075 | General Radio | |
| Hagerstown Regional Airport-Richard A Henson Field, Hagerstown | ||
| 134.150 | Approach/Departure - Washington Center | continuous |
| 120.300 | Tower | 0700-2200 Apr-Sep, 0700-2000 Oct-Mar |
| Maryland Airport, Indian Head | ||
| 119.850 | Potomac Approach/Departure | continuous |
| 122.700 | General Radio | |
| Captain Walter Francis Duke Regional Airport at St. Mary's, Leonardstown | ||
| 120.050 | Patuxent Approach/Departure | 0700-2300 Daily |
| 132.550 | Approach/Departure - Washington Center | 2301-0659 Daily |
| 123.000 | General Radio | |
| Freeway Airport, Mitchellville | ||
| 119.300 | Potomac Approach/Departure | continuous |
| 123.075 | General Radio | |
| Garrett County Airport, Oakland | ||
| 124.400 | Approach/Departure - Cleveland Center | continuous |
| 123.000 | General Radio | |
| Ocean City Municipal Airport, Ocean City | ||
| 127.950 | Patuxent Approach/Departure | 0700-2300 Daily |
| 127.700 | Approach/Departure - Washington Center | 2301-0659 Daily |
| 122.800 | General Radio | |
| Ridgeley Airpark, Ridgeley | ||
| 132.425 | Potomac Approach/Departure | 0800-2400 summer, 0700-2300 winter |
| 122.800 | General Radio | |
| Salisbury-Ocean City Wicomico Regional Airport, Salisbury | ||
| 127.950 | Patuxent Approach/Departure | 0700-2300 Daily |
| 132.550 | Approach/Departure - Washington Center | 2301-0659 Daily |
| 119.425 | Tower | 0600-2230 Daily |
| Bay Bridge Airport, Stevensville | ||
| 119.000 | Potomac Approach/Departure | continuous |
| 123.000 | General Radio | |
| Carroll County Regional Airport/Jack B Poage Field, Westminster | ||
| 126.750 | Potomac Approach/Departure | continuous |
| 122.700 | General Radio | |
| Clearview Airpark, Westminster | ||
| 126.750 | Potomac Approach/Departure | continuous |
| 122.800 | General Radio | |