Scanner Frequencies

Montgomery County, Maryland

This site is no longer being maintained since I no longer live in Montgomery County. However, the site will remain on-line for reference and historical purposes.

>>> Montgomery County's new trunked radio system is in use for all police and fire/EMS communications. You can find more information at radioreference.com (free registration required). Trunker data files are also available. Also see radioreference.com for current Montgomery County conventional frequencies .

>>> Real [Bizarre] Police and Fire/Rescue Dispatch/Operations

Legend of Remarks:
All frequencies in MHz unless otherwise noted.
* - frequency unverified by me
** - description unverified by me
D - duplex
I - repeater input
M - mobile/portable only, low power simplex
R - repeater output
S - simplex (dispatch only, unless close)
[xxx.x] - Continuous Tone Coded Squelch System (CTCCS) tone (Hz)
[None] - No CTCSS
[d xxx] - Digital Coded Squelch (DCS) code
[CSQ] - Carrier Squelch (no CTCSS/DCS)

Montgomery County Police

• Police Dispatch and Operations
• County police mobile radios are Motorola Spectra radios.  These radios have both repeated and talk-around ("direct") channels for each of the 12 channels below. There are no separate channel numbers for talk-around on the mobile radios per se; repeater/direct is indicated by a letter following the channel number on the mobile radios' display (e.g., channel "11R" and "11D").  The mobiles also have a "scan" mode which allows officers to monitor the other channels.
• The portable radios are 16-channel Motorola Saber radios.  The portables' channels 1-8 are repeated county police channels 1-8 and the portables' channels 9-16 are talk-around ("direct") for county police channels 1-8.
• Add 3 MHz to the frequency for each channel (1-12) to obtain the repeater input frequency.
• Channels 10, 11, and 12 are used almost exclusively in simplex (i.e., talk-around/direct) mode.
• Channel 6 is repeated in Metrorail tunnels.
• ERT/SWAT Radio Channel Plan

Channel	Frequency	Description	Remarks
1	494.7125	Rockville District (Sectors A, B, C)	R/M [156.7]
2	494.8625	Bethesda District (Sectors D, E)	R/M [156.7]
3	494.9125	Silver Spring District (Sector G)	R/M [156.7]
4	495.3125	Wheaton-Glenmont District (Sectors J, K)	R/M [156.7]
5	495.3375	Germantown District (Sectors M, N, P)	R/M [156.7]
6	495.3625	Secondary (Car-to-Car)/Tactical - South	R/M [156.7]
7	495.3875	Secondary (Car-to-Car)/Tactical - North	R/M [156.7]
8	495.4125	Simulcast of Channel 3	R/M [156.7]
9	495.2375	Rockville City Police	R/M [156.7]
10	494.4625	Special Investigations Division (SID)	R/M [156.7]
11	490.4375	Surveillance ("Tac 11")	R/M [156.7]
12	490.7125	Surveillance ("Tac 12")	R/M [156.7]
Others	490.5875  853.6625  854.9625	ERT/SWAT Operations  Mobile Data Terminals - South  Mobile Data Terminals - North	M [156.7] Data* Data*

Montgomery County Fire/Rescue

• Fire/Rescue Dispatch and Operations
• Detailed information on the Fire/Rescue radio system in Montgomery County can be found on the DFRS Emergency Communications Center page.
• Channel numbering varies among radios, particularly portables.
• Channel 7 is repeated above ground throughout the county and in Metrorail tunnels.

Channel	Frequency	Description	Remarks
1	153.95	Fireground/Alternate	S [156.7]
2	154.16	Dispatch/Operations	R [156.7]
3	155.52	Investigations/Fireground/Alternate	S [156.7]
4	155.1	Montgomery County Government Net F-1	S [156.7]
5	155.34	Fireground/Alternate (formerly "EMS 1")	S [156.7]
6	154.16	Talk-around (simplex channel 2)	M [156.7]
7	153.95	Potomac River/Metrorail Tunnel Operations (repeated channel 1)	R [156.7]
8	155.985	Montgomery County Government Net F-2	S [156.7]
9	154.28	Mutual Aid 2 (Base-to-Base and Fireground: Frederick, Prince George's, Howard, Carroll, Washington, Baltimore, Fairfax, DC, Anne Arundel)	S [CSQ]
10	153.95	Potomac River Operations (obsolete, channel 7 now used)	R
11	154.25	Howard County F-1 (Dispatch/Operations)	R [103.5]
12	154.22	Howard County F-2 (Fireground)	S [103.5]
13	154.19	District of Columbia Digital Trunk Dispatch Simulcast	R [77.0]
14	154.235	District of Columbia Old F-2 (EMS/Fireground)	S [77.0]
15	154.205	District of Columbia Old F-4 (Fireground)	S [77.0]
16	154.265	Mutual Aid 3 (Northern Virginia)	S [CSQ]
Others	154.295  154.355  154.71  154.83  33.04	Mutual Aid 1 (Base-to-Base: DC Metro Area F-MARS )  Smart-Status Messaging Terminals (SMTs)  Paired with 154.16  Paired with 153.95  Bethesda-Chevy Chase Rescue Squad	S [CSQ]  Data  I [156.7]  I [156.7]  S [CSQ]

EMRC Region 5 Hospital Consultations

• Duplex frequencies listed are the base transmit frequencies, add 5 MHz to obtain the mobile transmit frequencies.
• Montgomery County has moved all hospital consultations from EMS 1 to the Maryland EMRC radios, however EMS 1 is still available for in-county hospital consultations if needed (update: at least one hospital has removed their EMS 1 radio console).
• All Medic and Ambulance units have EMRC mobile radios. Most Medic units also have a portable EMRC radio.

Channel	Frequency	Description	Remarks
31	463.0	Med-1	D [192.8]
32	463.025	Med-2	D [192.8]
35	463.1	Med-5	D [192.8]
40	462.975	Med-10 (Call-2)	D [192.8]

 

Medevac Helicopters

• Maryland State Police Trooper Helicopters
• MedSTAR Helicopters: 462.975 (D) [203.5]
• AirCare Helicopters: 462.975 (S) [94.8]
• Medevac Consultation with Childrens Hospital: 462.975 (D) [167.9]

Hospital Mutual Aid Radio System (H-MARS)

• DC Hospitals: 462.4 (R) [77.0]

Police Mutual Aid Radio System (P-MARS)

• DC Metro Area P-MARS Frequency: 866.3625 (R) [156.7]
• P-MARS Participating Agencies
• Baltimore Area "Metro" Police Mutual Aid: 460.05 (S) [114.8]

Localities
 

City	Frequency	Description	Remarks
Chevy Chase Village	494.3625	Police (see County Police 9-Mary units)	S*
Gaithersburg	155.655	Police Car-to-Car (see County Police 9-Delta units)	S [156.7]
	156.24	Public Works	S [77.0]
Rockville	495.2375	Police (this is County Police channel 9)	R [156.7]
	155.76	Public Works - Channel 1 - Operations	S [107.2]
	155.745	Public Works - Channel 2 - Alternate	S [107.2]
Takoma Park	488.3625	Police - Channel 1 - Dispatch/Operations	R [100.0]
	488.3875	Police - Channel 2 - Alternate	R [100.0]

Montgomery County Park Police (M-NCPPC)

• Park Police Dispatch and Operations

Channel	Frequency	Description	Remarks
1/3	151.28	Dispatch/Operations	R/M [118.8]
2	151.34	Park Operations/Maintenance (including Snow Plows)	S [118.8]
Other	151.16	Paired with 151.28	I [118.8]

Montgomery County Sheriff

• Courthouse Security Frequency: 490.5875 (*)
• Other Sheriff operations on Police channels.
• The County Sheriffs use the same 10-codes and status activity codes as the County Police, see the County Police Dispatch/Ops page for those codes.

Montgomery County Detention Center (MCDC)

• Jail Frequency: 494.8125 (R) [156.7] (very low power)
• Location: 1307 Seven Locks Road, Rockville

Montgomery County Government

• Note: As of May 1999, all users of channel 1 have moved to channel 2, and channel 1 has been transferred to the county school system for bus operations.

Channel	Frequency	Description	Remarks
1	155.1	Animal Control/Humane Society; Environmental Protection; Building Code Inspectors	S [156.7]
2	155.985	County Security; Facilities & Services Division of Public Works	S [156.7]

Maryland State Police Troopers (MSP)

• Maryland State Police use the APCO 10 Codes.

Frequency	Description	Remarks
39.1	Statewide ("MSP 1")	S [110.9]
39.26	College Park - Barrack "Q" (Prince George's County)	S [110.9]
39.3	Forestville - Barrack "L" (Prince George's County)	S [110.9]
39.32	Rockville - Barrack "N" (Montgomery County)	S [110.9]
39.4	Frederick - Barrack "B" (Frederick County)	S [110.9]
39.42	Waterloo - Barrack "A" (Howard County)	S [110.9]
39.66	Criminal Investigations Division (CID)	S*
44.74	SysCom (Trooper Helicopter Operations)	S [110.9]
44.9	Emergency Management	S*
155.73	Mobile Extender (Portable Channel 1)	M [110.9]
155.475	Nationwide Police Channel (Portable Channel 2)	M
155.19	Barrack-to-Barrack (Portable Channel 3)	S [173.8]

Maryland Emergency Management Agency (MEMA)

• Maryland Emergency Operations Centers (EOC) Net: 143.04 (S) [CSQ]

Maryland Dept. of Natural Resources (DNR) Police

• DNR Police use the APCO 10 Codes.

Frequency	Description	Remarks
151.205	Dispatch/Operations	R [118.8]
159.24	Paired with 151.205	I

Maryland DNR Forest, Park and Wildlife Service

Channel	Frequency	Description	Remarks
1	151.460	Forestry - Eastern/Western	S [114.8]
2	151.325	Parks/Enforcement - Eastern/Western	S [114.8]
3	151.145	Forestry/Parks - Statewide	S [114.8]
4	151.355	Forestry - Central	S [114.8]
5	151.415	Parks/Enforcement - Central	S [114.8]
6	151.250	Forestry - Southern	S* [114.8]
7	151.310	Parks/Enforcement - Southern	S [114.8]
8	159.285	Forest Fire Common	S*
Other	159.45	Parks Statewide (Base: Tawes/Long Hill)	R [114.8]
	159.405	Paired with 159.45?	I*
	154.28	Fire Mutual Aid (ID: Long Hill)	S [CSQ]

Montgomery County Public Schools (MCPS)

• MCPS security patrol uses both channels (but not concurrently). They use the same 10 codes as the County Police, see the County Police Dispatch/Ops page for those codes. They can be heard week nights and on the weekend.

Channel	Frequency	Description	Remarks
1	155.1	School Bus Operations - North (Clarksburg, Shady Grove Depots) School Maintenance - North (including Snow Plows)	S [156.7]
2	155.805	School Bus Operations - South (Bethesda, Randolph, West Farm Depots) School Maintenance - South (including Snow Plows)	S [156.7]

MCPS Schools/Facilities

• School repeaters (very low power) for security, administration, and maintenance:
  • Blake High School: 452.75 (R*)
  • Churchill High School: 461.65 (R*)
  • Kennedy High School: 451.4 (R) [d 743]
  • Magruder High School: 451.525 (R) [d 226]
  • Northwest High School: 461.325 (R*)
  • Seneca Valley High School: 461.125 (R*), 462.125 (R*)
  • Watkins Mill High School: 464.725 (R) [d 025]
  • Wood Middle School: 462.25 (R*)
• Check the two frequencies below (especially channel 1) for activity at off-campus school events (e.g., dances, graduations, etc.)
• These two frequencies have been reported in use at multiple MCPS schools and facilities, the DCS varies from site to site.
  • Carver Educational Services Center (CESC): 464.375 (M) [d 265]
• These two channels may be in use at all MCPS schools/facilities.

Channel	Frequency	Description	Remarks
1	464.375	Security/Administration	M
2	464.55	Building Services/Alternate	M

Metrorail (WMATA)

• Metrorail Operations
• Note: Ops-3 covers the Blue Line south of Rosslyn.

Channel	Frequency	Description	Remarks
1	160.26	Ops-1 (Operations Control Net - Red Line)	S [CSQ]
2	160.38	Ops-2 (Operations Control Net - Blue/Orange Lines)	S [CSQ]
3	160.62	Ops-3 (Operations Control Net - Blue/Yellow/Green Lines)	S [CSQ]
4	161.025	Maintenance/Paging	S
5	161.235	Yards	S
6	160.605	Yards	S
7	161.415	Ops-7 Start-Up (Yard Control Net)	S [CSQ]

Metro Transit Police (WMATA)

• Metro Transit Police Dispatch/Operations

Channel	Frequency	Description	Remarks
1/2	161.385	Dispatch/Operations	R/M [CSQ]
Other	160.725	Paired with 161.385	I [179.9]

CSX

• Channel 1 (Road): 160.23 (S) [CSQ]
• Channel 2 (Dispatcher): 160.32 (S) [CSQ]
• Maintenance of Way: 161.16 (M)
• Maintenance of Way: 160.785 (S*)

U.S. Park Police

• U.S. Park Police use the APCO 10 Codes.
• Information on U.S. Park Police unit numbering is available (note, however, I have monitored  800 and 900 series units in addition to those listed).
• Link: U.S. Park Police

Channel	Frequency	Description	Remarks
1/6	166.725	Tactical/Special Events	R/M [127.3]
2/7	166.925	Dispatch/Operations	R/M [127.3]
3/8	167.075	Tactical/Administrative	R/M [127.3]
4	166.85	Tactical/Special Ops	M
5	172.475	National Capital Parks - Central	R [156.7]

National Park Service (NPS)

Frequency	Description	Remarks
168.3	National Capital Parks - West (C&O Canal)	R [141.3]
166.95	C&O Canal Rangers - Unit-to-Unit	M
168.425	National Capital Parks - East	R [141.3]
170.05	Antietam National Battlefield (Washington County)	R [141.3]
171.725	Catoctin Mountain Park (Frederick County)	R [141.3]
166.9	Shenandoah National Park (Virginia)	R [127.3]

Montgomery County Dept. of Public Works & Transportation

• These frequencies are very active during winter weather storms with salting/sanding and plowing operations.

Channel	Frequency	Description	Remarks
1/3	453.95	Highway Services Division - North Gaithersburg (East and West) Depot Damascus Depot Poolesville Depot	R/M [114.8]
2/4	453.4	Highway Services Division - South Colesville Depot Bethesda ("Seven Locks") Depot Silver Spring Depot	R/M [114.8]
Other	150.995  159.195	Transportation Management Center (TMC) Paired with 150.995	R [156.7]  I

Maryland State Highway Administration (SHA)

• SHA unit numbers are 4 digits, the first digit corresponding to the district.
• Montgomery County shops are "Gaithersburg," "Kensington," and "Fairland" (Silver Spring).
• SHA vehicles are also equipped with CB radios.
• These frequencies are very active during winter weather storms with salting/sanding and plowing operations.

Channel	Frequency	Description	Remarks
1	47.32	Statewide	S [94.8]
2	47.26	District 4 (Baltimore, Harford)	S* [94.8]
3	47.4	District 1 (Dorchester, Somerset, Wicomico, Worcester)	S [94.8]
4	47.14	District 2 (Caroline, Cecil, Kent, Queen Anne's, Talbot)	S* [94.8]
5	47.2	District 3 (Montgomery, Prince George's)	S [94.8]
Unknown	47.02	District 5 (Anne Arundel, Calvert, Charles, St. Mary's)	S* [94.8]
	47.1	District 6 (Allegany, Garrett, Washington)	S* [94.8]
	47.12	District 7 (Carroll, Frederick, Howard)	S [94.8]

Montgomery County RideOn Buses
 

Frequency	Description	Remarks
452.775	Gaithersburg Area (North)	R [203.5]
452.825	Silver Spring Area (South)	R [156.7]
452.85	GPS Bus Tracking	Data

Montgomery County Airpark (GAI)
 

Frequency	Description	Remarks
128.7	Approach/Departure (BWI Class B Airspace 181°-019°)	S
121.6	Clearance Delivery (thru BWI)	S
122.7	Unicom	S
128.275	Automated Weather Observing System (AWOS)	S
122.85	Multicom (Aviation Support/Runway Lighting Activation)	S

Civil Air Patrol (CAP)

• Nationwide Repeater, CAP National Capital Area (Net 8pm Sunday): 148.125 (R) [136.5]
• Nationwide Repeater, CAP Maryland (Net 7pm Thursday): 148.15 (R) [141.3], CAP Maryland (Net 7pm Tuesday): 148.15 (R) [100.0]

Washington Local Media
 

Frequency	Organization	Description	Remarks
455.55 455.1125	WJLA-TV (ABC 7) [Chopper 7]	Ch. 1, News Desk/Engineering Ch. 2, Alternate	S [100.0] S [100.0]
153.05 455.15	WRC-TV (NBC 4)	News Desk IFB	S [d 331] S [None]
161.73 161.76	WTTG-TV (Fox 5) [SkyFox Helicopter]	Ch. 1, News Desk Ch. 2, Alternate	S [CSQ] S*
450.75 450.2125	WUSA-TV (CBS 9)	Ch. 1, Engineering Ch. 2, News Desk	S [141.3] S [141.3]
455.9125 450.2375	Metro Traffic	Ch. 1, Operations Ch. 2, Alternate	R [141.3] S [d 743]
452.65	SmarTraveler	Traffic	R [131.8]
161.7 450.65	WMAL 630 AM	Traffic Reports	S [CSQ] S [CSQ]
450.2625	WMZQ 98.7 FM	Traffic Reports	S
161.64	WPGC 95.5 FM	Remotes	S [None]
452.975 452.975	Citywide Radio ["Firebuffs"]	Ch. 1A, Operations Ch. 6Z, Alternate	R [103.5] R [167.9]

Baltimore Local Media
 

Frequency	Organization	Description	Remarks
450.0375 450.1625 450.1375	WBAL-TV (NBC 11) [Chopper 11]	Ch. 1/2, News Desk Ch. 3/4, Engineering IFB	R/M [131.8] R/M [131.8] S [131.8]
450.5375 450.5625	WBFF-TV (Fox 45)	News Desk/Engineering IFB	R [123.0] S [123.0]
450.3875 450.4375 450.3375	WJZ-TV (CBS 13) [Chopper 13]	News Desk Engineering IFB	R [141.3] R [141.3] S [141.3]
450.3125	WMAR-TV (ABC 2)	News Desk/Engineering	R [131.8]
450.4875	Metro Traffic	Operations	R [141.3]
455.6 455.6125 450.3625	Hearst Radio (WBAL 1090 AM, WIYY 97.9 FM)	Traffic Reports Traffic Reports Operations	S [None] S [CSQ] S [82.5]
450.85	WQSR 105.7 FM	Traffic Reports	S [141.3]
450.0875	WWMX 106.5 FM	Traffic Reports	S [67.0]
455.95	?	Traffic Reports	S [141.3]

 

National Media (Washington)
 

Frequency	Organization	Description	Remarks
455.0875 455.5875	ABC	Ch. 1, News Desk Ch. 2, Engineering	S [136.5] S
450.4875 450.5125 450.6125	CBS	News Desk Engineering IFB	R [107.2] R [107.2] S [CSQ]
450.8875	CNN	News Desk	R [127.3]
161.67	NBC	News Desk	S [d 331]

Lakeforest Mall (Gaithersburg)
 

Frequency	Description	Remarks
464.5 464.55	Hecht's Loss Prevention	M [d 612] M [d 612]
466.2625 466.9625	JC Penney Loss Prevention	M* M [85.4]
467.1375	Lord and Taylor Loss Prevention	M [d 026]
464.7 467.7625	Mall - Security/Maintenance Mall - Maintenance	R [d 423] M [d 664]
467.85	FYE (formerly RecordTown)	M [167.9]
151.895	Sears Loss Prevention	M [77.0]
464.55	Unknown	M [67.0]

Washingtonian Center (Gaithersburg)
 

Frequency	Description	Remarks
467.7625	Galyan's	M*
467.8125	Loews Cineplex Rio 18	M [67.0]
464.975 463.6375	Marriott Washingtonian Hotel	R [d 343] M*
464.55	Rio Sport and Health Club	M [67.0]
151.625 151.955 151.895	Target - Operations Target - Stock Room Target - Loss Prevention	M [179.9] M [179.9] M [d 506]
467.9	Unknown - Loss Prevention (Galyan's?)	M

Milestone Center (Germantown)
 

Frequency	Description	Remarks
151.625	Target	M [179.9]
154.6	Unknown	M
464.55	Unknown	M [67.0]
154.57	Walmart	M

Montgomery Mall (Bethesda)

• Radios observed in use: American Eagle Outfitters (probable UHF), Mall Operations (UHF), and Champs Sports.

Frequency	Description	Remarks
467.8125	Express	M [67.0]
154.6	FinishLine	M
154.515	Gap	M [74.4]
464.5	Hecht's Loss Prevention	M [d 612]
463.7625	Mall Security (has phone patch)	R [203.5]
463.8375	Nordstrom Loss Prevention	R [173.8]
151.955	Old Navy	M [74.4]
151.895	Sears	M
154.6	Unknown (not FinishLine; Banana Republic?)	M [d 624]
467.9	Unknown	M
154.57	Unknown (Champs Sports?)	M
467.8125	Unknown (Mall Operations?)	M [d 754]

White Flint Mall (Kensington)
 

Frequency	Description	Remarks
469.1125 469.5	Dave and Buster's	M [d 413] M [d 506]
464.825	Mall Security/Maintenance	R [151.4]
464.55	Unknown - restaurant (Cheesecake Factory?)	M [67.0]

Local Businesses
 

Frequency	Description	Remarks
461.525 463.875	Asbury Methodist Village (Gaithersburg) - Maintenance Asbury Methodist Village (Gaithersburg) - Security/Transportation	R [d 152] R [d 152]
151.835	B&B Air Conditioning	S [88.5]
464.875	GE Information Services (Gaithersburg)	R [d 712]
467.85	Kentlands Stadium 8 (Gaithersburg)	M [67.0]
467.85	King Farm Visitors Center (Rockville)	M [67.0]
496.0375	Leisure World Security	R [179.9]
463.225	Magnum Group ["Amguard"] (Gaithersburg)	R/M [192.8]
463.45	Montgomery General Hospital (Olney)	R [203.5]
452.725	Norbeck Country Club	R [d 723]
151.955	Old Navy (Montrose Crossing)	M [74.4]
154.57	Olney 9 Cinemas	M
463.775	Pavilion Apartments (Rockville)	R [173.8]
451.775	Proactive Special Security Services (Montgomery Village Security Patrol)	R [146.2]
464.55	Regal Cinemas 13 (Rockville)	M [67.0]
154.57	Sam's Club (Gaithersburg)	M [67.0]
464.475	Shady Grove Adventist Hospital (Rockville)	R [85.4]
154.6	Toys R Us (Gaithersburg)	M [94.8]

Nextel Trunked Radio System

• Nextel operates a leased-access 900 MHz trunked radio system .

Montgomery County Agricultural Center (Gaithersburg)

• For the annual fair in August, monitor County Police commandpost on their channel 7, Fire/Rescue commandpost on their channel 3, and the Transportation Management Center (frequencies above).
• Below frequencies verified in use during August 2001 fair.

Frequency	Description	Remarks
461.1125 462.0125 463.5375 464.3875	MCAC - Admin MCAC - Ch. 2 - ticket sellers? MCAC - Security MCAC - food? cleaning?	M [d 174] M [d 271] M [d 743] M [d 624]
462.6875	Parking	M [67.0]
151.625 154.57 154.6	Unknown	M M M [107.2]
467.8125	food?	M

• Below frequencies verified in use during August 2000 fair.

Frequency	Description	Remarks
154.57 154.57 154.6	Parking	M [d 073] M [d 431] M [d 654]
151.625	Carnival Ride Ops	M [100.0]
462.6625	Tractor Pull Measurements	M [67.0]

Montgomery College

• Security Dispatch and Operations

Frequency	Description	Remarks
452.25	Rockville Campus Security	R [d 606]
452.25	Takoma Park Campus Security	R*
452.0 453.0	Germantown Campus	R* R*

• Frequencies and related information below were the same for all three campuses (Rockville, Germantown, and Takoma Park) unless otherwise noted, prior to the implementation of the new UHF repeaters.
• Montgomery College Rockville channel 1 used a CTCSS of 186.2.

Channel	Frequency	Description	Remarks
1	154.54	Security Dispatch and Operations	S
2	151.745	Security Unit-to-Unit/Surveillance & Grounds/Maintenance	S
3	151.805	Security Tactical	S*

Potomac Electric Power Company (PEPCO)

• During major power outages operations for a given geographic area may be found on any and/or all channels.
• Channel 4 is shared with Security when major isolated incidents occur (e.g., man hole explosions/fires).
• PEPCO crews use Nextel extensively for routine unit-to-unit communication.

Channel	Frequency	Description	Remarks
1	451.025	Montgomery County Operations	R [192.8]
2	451.05	DC Operations	R [192.8]
3	451.075	Prince George's County Operations	R [192.8]
4	451.15	Security	R [192.8]
5	451.125	Meter Reading	R [192.8]
6	451.25	Unit-to-Unit	M [192.8]

Washington Suburban Sanitary Commission (WSSC)

• 47.72, 47.94, 48.38, 48.54 (S) [77.0]

Washington Gas

• Washington Gas Trunked Radio System
• Trouble Dispatch: 47.7 (S) [CSQ]
• Operations: 47.9 (S**) [CSQ]
• Operations: 451.175 (R) [151.4]
• Simulcast Trouble Dispatch Only from 47.7 on 451.175.

U.S. Capitol Police

Channel	Frequency	Description	Remarks
1/6	169.225	Dispatch/Operations (Primary) Mon-Fri, Day (until 11pm): Inside/Building Operations	R/M [156.7]
2/7	165.5375	Tactical Mon-Fri, Day (until 11pm): Outside/Street Operations	R/M [118.8]
3/8	170.175	Tactical	R/M [107.2]
4/9	162.25	Command/Tactical Chamber Gallery Operations	R/M [146.2]
5/10	162.6125	Personal Protection/Special Operations	R/M [127.3]

Drug Enforcement Agency (DEA)
 

Channel	Frequency	Description	Remarks
1	418.625	Operations	R [156.7]
2	418.9	Operations	R*
3	418.75	Strike Force/Surveillance	S [156.7]
4	418.675	Strike Force/Surveillance	S [156.7]
5	418.825	Operations/Surveillance	R*
6	418.95	Operations/Surveillance	R [156.7]
7/8	418.975	Operations/Surveillance	R/M [156.7]

U.S. Customs Service

• Channel A1/A2: 165.2375 MHz (R/M) [100.0]

U.S. Postal Service

• Suburban Maryland Facility (on Shady Grove Road): 168.525 MHz (S) [CSQ]

National Institutes of Health (NIH)

• NIH Trunked Radio System
• NIH operates fire station 51 (Engine, Hazmat, Ambulance)

National Institute of Standards and Technology (NIST)

• Police/Fire Dispatch/Operations: 166.15 MHz (R) [CSQ]
• NIST operates fire station 53 (Engine, Ambulance).
• NIST shuttle buses: 164.025 MHz (S) [d 631]

National Naval Medical Center (NNMC)

• Naval District of Washington (NDW) Trunked Radio System
• NNMC operates fire station 50 (Engine only).

Walter Reed Army Medical Center (WRAMC)

• Fire: 172.125 (S) [131.8]
• WRAMC Forest Glen Annex operates fire station 54 (Engine only).

Department of State (DOS)

• Motor Pool: 409.625 (S) [151.4]
• Diplomatic Security Service (DSS) Protection: 411.425 (S) [151.4]

U.S. Marshals Service

• Operations: 163.2 (R) [136.5]
• Operations: 162.7875 (R) [CSQ]

CIA Security Protective Service

• "Tango" (Primary): 164.8625 (R) [156.7]
• "Victor" (Secondary): 172.575 (R) [156.7]

U.S. Secret Service

• Washington Field Office: 165.6875 (R) [103.5]
• Secret Service Uniformed Division (Foreign Missions Division)
  • Primary: 414.675 (R) [103.5]
  • Secondary: 415.975 (R) [103.5]
• "Baker" - Nationwide Commandpost: 165.7875 (S) [103.5]
• "Charlie" - Nationwide Primary/Commandpost: 165.375 (R/S) [103.5]
• "Mike" - Foreign Heads of State, Former Presidents, Presidential Candidates: 165.2125 (S) [103.5]
• "Oscar" - President: 164.8875 (S) [103.5]
• "Papa" - Technical Services Division: 164.4 (S) [103.5]
• "Tango" - Vice President: 164.65 (S) [103.5]

White House Communications Agency (WHCA)

• "Delta" - Marine Service Detachment: 169.925 (S) [103.5]
• "Hotel" - White House Motor Pool: 167.9 (S) [103.5]
• "November" - White House Staff: 166.7 (S) [103.5]

National Weather Service

• SKYWARN Amateur Radio Repeater (Bluemont, Virginia): 147.3 (R) [146.2]
• Pikesville, Maryland Weather Radio Transmitter: 162.4 MHz
• Hagerstown, Maryland Weather Radio Transmitter: 162.475 MHz
• Manassas, Virginia Weather Radio Transmiter: 162.55 MHz
• All three transmitters are operated by the National Weather Service's Sterling, Virginia office.

Oriole Park at Camden Yards (Baltimore, Maryland)