If you are in the Baltimore-Washington DC area and looking for some active milair freqs to monitor, I highly suggest programming the excellent list below from Ron. He monitored these freqs from his Mid-Atlantic monitoring post during the month of February 2011. Thanks for sharing Ron.
AAF Army Air Field
AFB Air Force Base
ArNG Army National Guard
ARTCC Air Route Traffic Control Center
RCAG Remote Communications Air/Ground
118.125 FACSFAC, Virginia Capes "Giant Killer" W386 check in/out
118.400 Andrews AFB Tower
118,675 Potomac TRACON
118.950 Potomac TRACON
119.275 NAS Patuxent River Area Advisory Control Bay Watch
119.100 Ronald Reagan National Airport (KDCA) tower.
119.300 Potomac TRACON
119.850 Potomac TRACON
120.050 NAS Patuxent River Approach/Departure
121.000 NAS Patuxent River Approach/Departure
121.300 Martin State Airport Tower
121.500 VHF guard
121.675 Washington ARTCC Montebello
123.200 NAS Patuxent River NTPS
123.225 Northrop-Grumman Test Facility, Baltimore
123.400 FAA Operations Reagan National & Atlantic City International Airport-also alternate freq for Northrop-Grumman Test Facility, Baltimore
123.700 NAS Patuxent River tower
124.000 Potomac TRACON Arlington National Cemetary Fly-by control
126.300 Davison AAF/Felker AAF VA tower
125.650 Potomac TRACON
126.550 Potomac TRACON
125.900 Dover AFB Arrival
126.150 Phillips AAF Aberdeen MD
126.200 Weide AAF Aberdeen MD
126.300 Davison AAF Tower
126.350 Dover AFB Tower
126.550 Potomac TRACON
127.950 NAS Patuxent River Approach/Departure
128.350 Potomac TRACON
132.425 Dover AFB Approach/Departure
132.550 Washington ARTCC Snow Hill RCAG Cape Charles sector
133.900 Washington ARTCC Calvert
134.100 Dover AFB and McGuire AFB Command Post
134.350 Washington Helo Control (DCA)
135.025 NAS Patuxent River GCA
135.525 Washington ARTCC DC area/Guard Dog CAP
136.525 US Customs (AM Mode)
136.725 SAM A-A (AM Mode) (May have been changed to 292.8)
138.200 Atlantic City International Airport 119FS NJ ANG (AM mode)
139.150 Andrews AFB 121FS DC ANG (AM mode)
139.300 Andrews AFB Pilot to Dispatcher (AM mode)
139.400 Davidson AAF Operations (AM mode)
139.700 NORAD Eastern Air Defense Sector Huntress (AM mode)
139.875 McGuire Tanker Interplane (AM mode)
139.850 Sierra Nevada Corp test discrete (FM Mode)
139.900 Andrews AFB MD 121st FS SOF (AM Mode)
141.550 Andrews AFB Griffin Command Post (AM mode)
141.700 Andrews AFB 89AW/1HS Operations (AM mode)
141.750 Langley AFB Dispatch (AM mode)
142.750 Andrews AFB MD SAM OPS, 99th AS (AM Mode)
143.150 Andrews AFB 121FS DC ANG (AM mode)
143.600 Andrews AFB 121FS DC ANG (AM mode)
148.150 Maryland Civil Air Patrol (FM Mode)
149.275 Maryland Civil Air Patrol, Martin State Airport Baltimore (FM Mode)
157.050 US Coast Guard Air Station Wash DC (KDCA)-also used as A-A for CGAS Wash HH-65Cs (FM Mode)
157.150 US Coast Guard HH-65Cs at CGAS Wash (KDCA) (FM-Mode)
227.125 Washington ARTCC Hagerstown RCAG
228.175 Langley AFB 1FW Air-Air
228.450 Langley AFB 1FW Air-Air
228.900 Huntress DC area/Guard Dog CAP
231.200 Virginia ArNG Ops Richmond IAP VA
233.700 FACSFAC, Virginia Capes "Giant Killer" W72
233.850 NAS Patuxent River MD "Shade Tree" control
234.800 Andrews AFB MD 121st FS DC ANG SOF
236.825 Washington ARTCC Snow Hill RCAG
237.200 Bollen Range/Kiowa MOA, Ft Indiantown GAP PA
238.100 FACSFAC, Virginia Capes "Giant Killer" W386 check in/out
238.900 AR 636 primary
239.050 New York ARTCC Joliet RCAG Lancaster sector
239.800 McGuire AFB/Langley AFB Metro
241.000 Weide AAF, Aberseen MD
241.300 Pentagon Heliport
241.450 NAS Patuxent River MD
243.000 UHF Guard
249.650 NAS Patuxent River test discrete
249.800 FACSFAC, Virginia Capes "Giant Killer" W386 check in/out
250.300 NAS Patuxent River Approach/Departure
250.700 NAS Patuxent River VX-23 Operations
250.850 NAS Patuxent River Area Advisory Control Bay Watch
251.200 McGuire AFB NJ CP (Brickyard)
251.250 Langley AFB Command Post (Raymond 16)
254.200 FACSFAC, Virginia Capes "Giant Killer" discrete (LFI 14 prime).
254.300 Washington ARTCC Ship Bottom RCAG Coyle sector
255.000 FACSFAC, Virginia Capes "Giant Killer" W107
255.400 Leesburg VA/Millville DE Radio FSS
255.700 US Army helo A-A
256.500 NAS Patuxent River Area Advisory Control Bay Watch
257.200 Potomac TRACON
257.700 Washington ARTCC Whaleyville RCAG Salisbury sector
257.875 Dover AFB Approach/Departure
260.900 Huntress DC area/Guard Dog CAP
261.000 119 FS NJ ANG Devil Ops Atlantic City International Airport
262.025 Langley AFB Air-Air 149th FS VA ANG
262.600 NAS Patuxent River MD GCA
262.950 NAS Patuxent River Echo Control
263.100 Washington ARTCC Azalea sector
264.150 NAS Patuxent River NTPS Operations
264.550 NAS Patuxent River Echo Control
267.350 Sierra Nevada Corp test discrete
268.800 NAS Chambers VA Operations
268.850 NAS Patuxent River Echo Control
269.100 New York ARTCC Milton Sector
269.900 Langley AFB Virginia A-A
270.275 Potomac TRACON
270.300 New York ARTCC Big Flat RCAG Lancaster sector
270.800 NAS Patuxent River Area Advisory Control Bay Watch-PAX button #9
271.600 NAS Norfolk Metro
273.950 MCB/MCAF Quantico HMX-1 discrete
274.450 AAR 777 primary
276.675 Langley AFB Virginia A-A
277.600 NORAD Eastern Air Defense Sector Huntress
279.275 Potomac TRACON Arlington National Cemetary Fly-by control
278.300 New York ARTCC Flint Hill RCAG Pottstown sector
281.400 Washington ARTCC Patuxent River RCAG Calvert sector
281.450 Washington ARTCC Atlantic City RCAG
281.525 Harrisburg Approach/Departure
281.800 NAS Patuxent River Approach/Departure
282.250 Washington ARTCC Bucks Elbow RCAG Casanova sector
283.100 Warren Grove NJ Range
283.750 457th AS Andrews AFB MD "Caribou" Ops
284.700 Washington ARTCC Bucks Elbow RCAG Montebello sector
285.400 Washington ARTCC Sea Isle RCAG Casino sector
288.000 AR 777
288.350 Washington ARTCC
288.400 NORAD Eastern Air Defense Sector Huntress
290.425 Washington ARTCC Green Bay RCAG Franklin sector
291.500 NAS Patuxent River Echo Control
292.200 Andrews AFB 89AW/1HS Air-Air
292.800 Andrews AFB MD SAM A-A
296.900 Langley AFB A-A
297.000 CP (Pikeside) WVA ANG Martinsburg WVA
297.200 Martin State Airport Tower
299.000 NAS Patuxent River MD
302.550 NAS Patuxent River Ops
305.200 NAS Patuxent River Area Advisory Control Bay Watch
305.700 MCAS Cherry Pt NC CP
306.200 New York ARTCC Philipsburg RCAG
306.800 Willow Grove NAS/JRB Operations
307.025 Washington ARTCC Falls Church RCAG Potomac sector
310.550 NAS Patuxent River Echo Control
311.000 VQ-4 Det, NAS Patuxent River MD
312.300 FACSFAC, Virginia Capes "Giant Killer" W386 common (LFI 36 prime)
314.000 NAS Patuxent River Approach/Departure
314.250 Andrews AFB MD 201st AS DC ANG "Boxer" Ops
317.425 Potomac TRACON Departure
319.400 McGuire AFB CP "Brickyard"
320.450 NAS Patuxent River MD Echo Control
322.300 New York ARTCC Lancaster RGAG
322.400 New York ARTCC Middletown RGAG
322.550 Washington ARTCC Linden RCAG Linden sector
323.225 Washington ARTCC Hopewell sector
323.300 New York ARTCC Millville RCAG Lancaster sector
324.000 Huntress-DC area/Guard Dog CAP
327.000 Washington ARTCC Brooke sector
328.400 Andrews AFB VR-53 Operations
335.500 Potomac TRACON
335.600 New York ARTCC Modena RCAG
339.675 VX-20 NAS Patuxent River flight test discrete
341.100 NAS Patuxent River VSX-1 Ops
341.950 NAS Patuxent River Echo Control
342.000 Dover AFB Metro
343.625 NAS Patuxent River MD tower
344.600 Andrews AFB Metro
345.000 Coast Guard primary A-A
346.600 FACSFAC, Virginia Capes "Giant Killer" W386 common
347.200 Martin State Airport MD ANG Raven Ops
348.000 NAS Patuxent River MD Approach/Departure
348.725 Potomac TRACON
349.000 Andrews AFB Tower
349.400 Dover AFB Command Post
349.500 NAS Chambers VA CP
349.700 AR 20 primary
350.000 FACSFAC, Virginia Capes "Giant Killer" W386 common
350.250 ZDC DC area/Guard Dog CAP
351.200 Andrews AFB 459ARW/756ARS Command Post "Liberator"
354.150 Washington ARTCC Smyrna RCAG Kenton sector
354.800 NAS Patuxent River Area Advisory Control Bay Watch
355.300 MCAF Quantico VA Base Ops
359.100 Washington ARTCC Gordonsville Sector
360.700 Washington ARTCC Baltimore RCAG Swann sector
360.850 Washington ARTCC Falls Church RCAG Irons sector
363.000 Washington ARTCC Millville RCAG Woodstowne sector
363.900 Langley AFB VA A-A (39 prime)
364.125 Langley AFB VA 94th FS discrete
364.200 Huntress/AICC
365.700 NAS Patuxent River test discrete
368.800 Andrews AFB MD Naval Air Facility Ops
369.900 NAS Patuxent River Area Advisory Control Bay Watch
370.925 Norfolk Approach/Depature
376.200 Langley AFB Dispatch.
377.200 Washington ARTCC Tech Sector.
378.100 Andrews AFB Griffin Command Post
381.300 Pope AFB NC CP
381.700 NAS Patuxent River Echo Control
383.700 NAS Patuxent River MD "Sail Lab"
384.100 Martin State Airport 135th Command Post Crab Ops
395.100 193rd SOG PA ANG Harrisburg PA-Baton Ops