About Green Valley Police Frequencies
- 2 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- 1 conventional channel uses a digital mode (DMR), which needs a scanner that decodes that mode.
- Trunked radio systems that carry law-enforcement traffic here: First Responders Interoperable Radio System Team (FIRST): 237 talkgroups; Frederick County, MD: 21 talkgroups. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Green Valley, start with the Mt. Airy ASR site of First Responders Interoperable Radio System Team (FIRST), about 4 miles away. Its control channels: 774.04375, 774.80625 MHz.
- 153 listed entries are marked encrypted. No scanner can decode encrypted audio.
Frederick County channels that also cover Green Valley
Talk-around & Car-to-Car
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Frederick County Sheriff | FCSO/FPD Talk Around | 851.8375 | 156.7 PL | FMN | — |
| Frederick County Sheriff | FCSO/FPD Talk Around | 853.5125 | 156.7 PL | FMN | — |
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Frederick County Sheriff | Adult Detention Center | 490.4125 In 493.4125 | CC 1 · TG 1 · SL 1 | DMR | WPKL710 |
First Responders Interoperable Radio System Team (FIRST)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Bowie State University | Bowie State University – Dispatch | 14416 | 3850 | T |
| Frostburg State University | Frostburg State University – Dispatch | 11855 | 2e4f | T |
| Maryland Capitol Police | Headquarters | 7867 | 1ebb | T |
| Maryland Department of Health | Spring Grove Hospital Center Police | 8196 | 2004 | T |
| Maryland Department of Health | Eastern Shore Hospital Center Police | 8215 | 2017 | T |
| Maryland Department of Labor, Licensing, and Regulation | Maryland Department of Labor, Licensing, and Regulation – Dispatch | 8120 | 1fb8 | T |
| Maryland State Police | Northern Troop | 7301 | 1c85 | T |
| Maryland State Police | Barrack D Bel Air | 7302 | 1c86 | T |
| Maryland State Police | Barrack F North East | 7303 | 1c87 | T |
| Maryland State Police | Barrack M JFK | 7304 | 1c88 | T |
| Maryland State Police | Central Troop | 7313 | 1c91 | T |
| Maryland State Police | Barrack G Westminster | 7314 | 1c92 | T |
| Maryland State Police | Barrack R Golden Ring | 7315 | 1c93 | T |
| Maryland State Police | Barrack A Waterloo | 7316 | 1c94 | T |
| Maryland State Police | Pikesville HQ | 7317 | 1c95 | T |
| Maryland State Police | Eastern Troop | 7327 | 1c9f | T |
| Maryland State Police | Barrack S Centreville | 7328 | 1ca0 | T |
| Maryland State Police | Barrack I Easton | 7329 | 1ca1 | T |
| Maryland State Police | Barrack E Salisbury | 7330 | 1ca2 | T |
| Maryland State Police | Barrack V Berlin | 7331 | 1ca3 | T |
| Maryland State Police | Barrack X Princess Anne | 7332 | 1ca4 | T |
| Maryland State Police | Washington Metro Troop | 7345 | 1cb1 | T |
| Maryland State Police | Barrack N Rockville | 7346 | 1cb2 | T |
| Maryland State Police | Barrack Q College Park | 7347 | 1cb3 | T |
| Maryland State Police | Barrack L Forestville | 7348 | 1cb4 | T |
| Maryland State Police | Southern Troop | 7357 | 1cbd | T |
| Maryland State Police | Barrack P/J Glen Burnie/Annapolis | 7358 | 1cbe | T |
| Maryland State Police | Barrack H La Plata | 7359 | 1cbf | T |
| Maryland State Police | Barrack U Prince Frederick | 7360 | 1cc0 | T |
| Maryland State Police | Barrack T Leonardtown | 7361 | 1cc1 | T |
| Maryland State Police | Western Troop | 7372 | 1ccc | T |
| Maryland State Police | Barrack W McHenry | 7373 | 1ccd | T |
| Maryland State Police | Barrack C Cumberland | 7374 | 1cce | T |
| Maryland State Police | Barrack O Hagerstown | 7375 | 1ccf | T |
| Maryland State Police | Barrack B Frederick | 7376 | 1cd0 | T |
| Maryland Transit Administration | Maryland Transit Administration – Dispatch – North | 7999 | 1f3f | T |
| Maryland Transit Administration | Maryland Transit Administration – Dispatch – South | 8001 | 1f41 | T |
| Maryland Transportation Authority | Central Command | 7101 | 1bbd | T |
| Maryland Transportation Authority | Port of Baltimore/Key Bridge | 7102 | 1bbe | T |
| Maryland Transportation Authority | BWI Airport | 7103 | 1bbf | T |
| Maryland Transportation Authority | Intercounty Connector | 7104 | 1bc0 | T |
| Maryland Transportation Authority | Hatem Bridge/ICC | 7105 | 1bc1 | T |
| Maryland Transportation Authority | Bay Bridge | 7106 | 1bc2 | T |
| Maryland Transportation Authority | Nice Bridge | 7107 | 1bc3 | T |
| Morgan State University | Morgan State University – Dispatch | 8476 | 211c | T |
| Towson University | Towson University – Dispatch | 8151 | 1fd7 | T |
| University of Baltimore | University of Baltimore – Dispatch | 8148 | 1fd4 | T |
| University of Maryland - Baltimore | University of Maryland – Baltimore – Dispatch | 8471 | 2117 | T |
| University of Maryland - College Park | UMCP Police Dispatch | 8451 | 2103 | T |
| Maryland Aviation Administration | Law Tactical | 8018 | 1f52 | T |
| Maryland Capitol Police | Events | 7868 | 1ebc | T |
| Maryland Department of Natural Resources | Natural Resources Police – Reserve Officers | 8399 | 20cf | T |
| Maryland Department of Public Safety and Correctional Services | Judiciary Special Police Officers Tactical | 8499 | 2133 | T |
| Maryland State Police | Motor (Motorcycle Unit) | 7432 | 1d08 | T |
| Maryland State Police | Commercial Vehicle Enforcement Division | 7463 | 1d27 | T |
| Maryland Transit Administration | Maryland Transit Administration – Tactical Channel | 8000 | 1f40 | T |
| Maryland Transit Administration | Maryland Transit Administration – Tactical Channel | 8002 | 1f42 | T |
| Maryland Transportation Authority | Training | 7140 | 1be4 | T |
| Maryland Transportation Authority | Training | 7141 | 1be5 | T |
| Maryland Transportation Authority | Training | 7142 | 1be6 | T |
| Morgan State University | Morgan State University – Tactical Channel | 8477 | 211d | T |
| Morgan State University | Morgan State University – Tactical Channel | 8478 | 211e | T |
| Towson University | Towson University – Tactical Channel | 8152 | 1fd8 | T |
| Towson University | Towson University – Tactical Channel | 8153 | 1fd9 | T |
| Towson University | Towson University – Tactical Channel | 8154 | 1fda | T |
| Towson University | Towson University – Tactical Channel | 8155 | 1fdb | T |
| Towson University | Towson University – Tactical Channel | 8156 | 1fdc | T |
| University of Baltimore | University of Baltimore – Tactical Channel | 8149 | 1fd5 | T |
| University of Baltimore | University of Baltimore – Tactical Channel | 8150 | 1fd6 | T |
| University of Maryland - Baltimore | University of Maryland – Baltimore – Tactical Channel | 8472 | 2118 | T |
| University of Maryland - Baltimore | University of Maryland – Baltimore – Tactical Channel | 8473 | 2119 | T |
| University of Maryland - College Park | UMCP Police Tactical | 8452 | 2104 | T |
| University of Maryland - College Park | UMCP Police Tactical | 8453 | 2105 | T |
| University of Maryland - College Park | UMCP Police All Call | 8457 | 2109 | T |
| Maryland Department of Natural Resources | Natural Resources Police – Area 3 Tactical | 7574 | 1d96 | T |
| Maryland Department of Natural Resources | Inservice (Training – Instructors) | 7588 | 1da4 | T |
| Maryland Department of Natural Resources | Inservice (Training) | 7589 | 1da5 | T |
| Maryland Department of Natural Resources | Inservice (Training) | 7590 | 1da6 | T |
| Maryland Department of Natural Resources | Natural Resources Police – Recruit Training | 14219 | 378b | T |
| Maryland Department of Public Safety and Correctional Services | Judiciary Special Police Officers Main | 8500 | 2134 | T |
| University of Maryland - College Park | UMCP Police Training | 8454 | 2106 | T |
| University of Maryland - College Park | UMCP Student Police Aides | 8455 | 2107 | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C1 | 7701 | 1e15 | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C2 | 7702 | 1e16 | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C3 | 7703 | 1e17 | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C4 | 7704 | 1e18 | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C5 | 7705 | 1e19 | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C6 | 7706 | 1e1a | T |
| Maryland Department of Public Safety and Correctional Services | Warrant Apprehension Unit (WAU) – West | 7707 | 1e1b | T |
| Maryland Department of Public Safety and Correctional Services | Warrant Apprehension Unit (WAU) | 7708 | 1e1c | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C9 | 7709 | 1e1d | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C10 | 7710 | 1e1e | T |
| Maryland Department of Public Safety and Correctional Services | Maryland Central Transportation Unit C11 | 7711 | 1e1f | T |
| Maryland Department of Public Safety and Correctional Services | Home Detention Unit | 7716 | 1e24 | T |
143 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Federal | National Park Service National Capital Region Law Enforcement | 8415 | 20df | T Encrypted |
| Johns Hopkins University | Police 1 | 14401 | 3841 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area (Prince George's/Anne Arundel) | 7501 | 1d4d | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area (Carroll, Howard, Montgomery, Tidal Waterways of Baltimore City and Baltimore County) | 7506 | 1d52 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area (Baltimore City (Land)/Baltimore County (Land)/Harford/Cecil) | 7511 | 1d57 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area (Frederick/Washington) | 7516 | 1d5c | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area (Allegany/Garrett) | 7521 | 1d61 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area (Calvert/Charles/St. Mary's) | 7546 | 1d7a | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area (Somerset/Wicomico/Worcester) | 7551 | 1d7f | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area (Caroline/Dorchester/Kent/Queen Anne/Talbot) | 7557 | 1d85 | T Encrypted |
| Johns Hopkins University | Police 2 | 14402 | 3842 | T Encrypted |
| Johns Hopkins University | Police 3 | 14403 | 3843 | T Encrypted |
| Johns Hopkins University | Police 4 | 14404 | 3844 | T Encrypted |
| Johns Hopkins University | Police 5 | 14405 | 3845 | T Encrypted |
| Johns Hopkins University | Police 6 | 14406 | 3846 | T Encrypted |
| Johns Hopkins University | Police 7 | 14407 | 3847 | T Encrypted |
| Johns Hopkins University | Police 8 | 14408 | 3848 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 3 Tactical | 7502 | 1d4e | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 3 Tactical | 7503 | 1d4f | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 5 Tactical | 7507 | 1d53 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 5 Tactical | 7508 | 1d54 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 6 Tactical | 7512 | 1d58 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 6 Tactical | 7513 | 1d59 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 7 Tactical | 7517 | 1d5d | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 7 Tactical | 7518 | 1d5e | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 8 Tactical | 7522 | 1d62 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 8 Tactical | 7523 | 1d63 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Tactical Response Team | 7533 | 1d6d | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 4 Tactical | 7547 | 1d7b | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 4 Tactical | 7548 | 1d7c | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 1 Tactical | 7552 | 1d80 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 1 Tactical | 7553 | 1d81 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 2 Tactical | 7558 | 1d86 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Area 2 Tactical | 7559 | 1d87 | T Encrypted |
| Maryland State Police | Northern Troop – Tactical | 7305 | 1c89 | T Encrypted |
| Maryland State Police | Barrack D Bel Air – Tactical | 7306 | 1c8a | T Encrypted |
| Maryland State Police | Barrack F North East – Tactical | 7307 | 1c8b | T Encrypted |
| Maryland State Police | Barrack M JFK – Tactical | 7308 | 1c8c | T Encrypted |
| Maryland State Police | Northern Troop – CID | 7309 | 1c8d | T Encrypted |
| Maryland State Police | Barrack D Bel Air – CID | 7310 | 1c8e | T Encrypted |
| Maryland State Police | Barrack F North East – CID | 7311 | 1c8f | T Encrypted |
| Maryland State Police | Barrack M JFK – CID | 7312 | 1c90 | T Encrypted |
| Maryland State Police | Central Troop – Tactical | 7318 | 1c96 | T Encrypted |
| Maryland State Police | Barrack G Westminster – Tactical | 7319 | 1c97 | T Encrypted |
| Maryland State Police | Barrack R Golden Ring – Tactical | 7320 | 1c98 | T Encrypted |
| Maryland State Police | Barrack A Waterloo – Tactical | 7321 | 1c99 | T Encrypted |
| Maryland State Police | Pikesville HQ – Tactical | 7322 | 1c9a | T Encrypted |
| Maryland State Police | Central Troop – CID | 7323 | 1c9b | T Encrypted |
| Maryland State Police | Barrack G Westminster – CID | 7324 | 1c9c | T Encrypted |
| Maryland State Police | Barrack R Golden Ring – CID | 7325 | 1c9d | T Encrypted |
| Maryland State Police | Barrack A Waterloo – CID | 7326 | 1c9e | T Encrypted |
| Maryland State Police | Eastern Troop – Tactical | 7333 | 1ca5 | T Encrypted |
| Maryland State Police | Barrack S Centreville – Tactical | 7334 | 1ca6 | T Encrypted |
| Maryland State Police | Barrack I Easton – Tactical | 7335 | 1ca7 | T Encrypted |
| Maryland State Police | Barrack E Salisbury – Tactical | 7336 | 1ca8 | T Encrypted |
| Maryland State Police | Barrack V Berlin – Tactical | 7337 | 1ca9 | T Encrypted |
| Maryland State Police | Barrack X Princess Anne – Tactical | 7338 | 1caa | T Encrypted |
| Maryland State Police | Eastern Troop – CID | 7339 | 1cab | T Encrypted |
| Maryland State Police | Barrack S Centreville – CID | 7340 | 1cac | T Encrypted |
| Maryland State Police | Barrack I Easton – CID | 7341 | 1cad | T Encrypted |
| Maryland State Police | Barrack E Salisbury – CID | 7342 | 1cae | T Encrypted |
| Maryland State Police | Barrack V Berlin – CID | 7343 | 1caf | T Encrypted |
| Maryland State Police | Barrack X Princess Anne – CID | 7344 | 1cb0 | T Encrypted |
| Maryland State Police | Washington Metro Troop – Tactical | 7349 | 1cb5 | T Encrypted |
| Maryland State Police | Barrack N Rockville – Tactical | 7350 | 1cb6 | T Encrypted |
| Maryland State Police | Barrack Q College Park – Tactical | 7351 | 1cb7 | T Encrypted |
| Maryland State Police | Barrack L Forestville – Tactical | 7352 | 1cb8 | T Encrypted |
| Maryland State Police | Washington Metro Troop – CID | 7353 | 1cb9 | T Encrypted |
| Maryland State Police | Barrack N Rockville – CID | 7354 | 1cba | T Encrypted |
| Maryland State Police | Barrack Q College Park – CID | 7355 | 1cbb | T Encrypted |
| Maryland State Police | Barrack L Forestville – CID | 7356 | 1cbc | T Encrypted |
| Maryland State Police | Southern Troop – Tactical | 7362 | 1cc2 | T Encrypted |
| Maryland State Police | Barrack P/J Glen Burnie/Annapolis – Tactical | 7363 | 1cc3 | T Encrypted |
| Maryland State Police | Barrack H La Plata – Tactical | 7364 | 1cc4 | T Encrypted |
| Maryland State Police | Barrack U Prince Frederick – Tactical | 7365 | 1cc5 | T Encrypted |
| Maryland State Police | Barrack T Leonardtown – Tactical | 7366 | 1cc6 | T Encrypted |
| Maryland State Police | Southern Troop – CID | 7367 | 1cc7 | T Encrypted |
| Maryland State Police | Barrack P/J Glen Burnie/Annapolis – CID | 7368 | 1cc8 | T Encrypted |
| Maryland State Police | Barrack H La Plata – CID | 7369 | 1cc9 | T Encrypted |
| Maryland State Police | Barrack U Prince Frederick – CID | 7370 | 1cca | T Encrypted |
| Maryland State Police | Barrack T Leonardtown – CID | 7371 | 1ccb | T Encrypted |
| Maryland State Police | Western Troop – Tactical | 7377 | 1cd1 | T Encrypted |
| Maryland State Police | Barrack W McHenry – Tactical | 7378 | 1cd2 | T Encrypted |
| Maryland State Police | Barrack C Cumberland – Tactical | 7379 | 1cd3 | T Encrypted |
| Maryland State Police | Barrack O Hagerstown – Tactical | 7380 | 1cd4 | T Encrypted |
| Maryland State Police | Barrack B Frederick – Tactical | 7381 | 1cd5 | T Encrypted |
| Maryland State Police | Western Troop – CID | 7382 | 1cd6 | T Encrypted |
| Maryland State Police | Barrack W McHenry – CID | 7383 | 1cd7 | T Encrypted |
| Maryland State Police | Barrack C Cumberland – CID | 7384 | 1cd8 | T Encrypted |
| Maryland State Police | Barrack O Hagerstown – CID | 7385 | 1cd9 | T Encrypted |
| Maryland State Police | Barrack B Frederick – CID | 7386 | 1cda | T Encrypted |
| Maryland State Police | Executive Protection Section | 7398 | 1ce6 | T Encrypted |
| Maryland State Police | Pro-Active Criminal Enforcement Team | 7404 | 1cec | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7405 | 1ced | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7406 | 1cee | T Encrypted |
| Maryland State Police | Office of the State Fire Marshal – Northeast Regional Office | 7412 | 1cf4 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7413 | 1cf5 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7417 | 1cf9 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7419 | 1cfb | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7422 | 1cfe | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7423 | 1cff | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7426 | 1d02 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7429 | 1d05 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7430 | 1d06 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7442 | 1d12 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7448 | 1d18 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7452 | 1d1c | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7453 | 1d1d | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7456 | 1d20 | T Encrypted |
| Maryland State Police | Executive Protection Section – Tactical | 7467 | 1d2b | T Encrypted |
| Maryland State Police | STATE Team | 7469 | 1d2d | T Encrypted |
| Maryland State Police | Mid-Shore Law Tactical | 7482 | 1d3a | T Encrypted |
| Maryland State Police | Office of the State Fire Marshal – Upper Eastern Regional Office | 7491 | 1d43 | T Encrypted |
| Maryland State Police | Maryland State Police – Tactical Channel | 7499 | 1d4b | T Encrypted |
| Maryland Transit Administration | Maryland Transit Administration – Tactical Channel | 8003 | 1f43 | T Encrypted |
| Maryland Transportation Authority | SOD Tactical | 7109 | 1bc5 | T Encrypted |
| Maryland Transportation Authority | SOD Tactical | 7110 | 1bc6 | T Encrypted |
| Maryland Transportation Authority | SOD Tactical | 7111 | 1bc7 | T Encrypted |
| Maryland Transportation Authority | Special Response Team | 7112 | 1bc8 | T Encrypted |
| Maryland Transportation Authority | CID | 7113 | 1bc9 | T Encrypted |
| Maryland Transportation Authority | Central Command Tactical | 7125 | 1bd5 | T Encrypted |
| Maryland Transportation Authority | Key Bridge Tactical | 7126 | 1bd6 | T Encrypted |
| Maryland Transportation Authority | Port of Baltimore Tactical | 7127 | 1bd7 | T Encrypted |
| Maryland Transportation Authority | Intercounty Connector Tactical | 7128 | 1bd8 | T Encrypted |
| Maryland Transportation Authority | Bay Bridge Tactical | 7130 | 1bda | T Encrypted |
| Maryland Transportation Authority | Nice Bridge Tactical | 7131 | 1bdb | T Encrypted |
| Maryland Transportation Authority | CVSU | 7132 | 1bdc | T Encrypted |
| Maryland Transportation Authority | Aggressive Driving Unit Tactical | 7133 | 1bdd | T Encrypted |
| Maryland Transportation Authority | K9 Tactical | 7134 | 1bde | T Encrypted |
| Maryland Transportation Authority | Motors | 7135 | 1bdf | T Encrypted |
| Maryland Transportation Authority | Marine Unit | 7136 | 1be0 | T Encrypted |
| Maryland Transportation Authority | Special Event | 7137 | 1be1 | T Encrypted |
| Comptroller of Maryland | Comptroller Investigations Unit – Main | 8226 | 2022 | T Encrypted |
| Comptroller of Maryland | Comptroller Investigations Unit – Tactical | 8227 | 2023 | T Encrypted |
| Comptroller of Maryland | Comptroller Investigations Unit – Tactical | 8228 | 2024 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Wireless Communications Managers | 7529 | 1d69 | T Encrypted |
| Maryland Department of Natural Resources | Natural Resources Police – Training Academy | 8392 | 20c8 | T Encrypted |
| Maryland State Police | Academy Training | 8501 | 2135 | T Encrypted |
| Maryland State Police | Academy Training | 8502 | 2136 | T Encrypted |
| Maryland State Police | Academy Training | 8503 | 2137 | T Encrypted |
| Maryland Department of Public Safety and Correctional Services | Central Booking | 7717 | 1e25 | T Encrypted |
| Maryland Department of Public Safety and Correctional Services | Central Booking | 7718 | 1e26 | T Encrypted |
| Maryland Department of Public Safety and Correctional Services | Central Booking | 7720 | 1e28 | T Encrypted |
Frederick County, MD
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| City Police | Announcement | 5549 | 15ad | D |
| Frederick County Sheriff | Countywide | 5401 | 1519 | D |
| Frederick County Sheriff | Frederick County Sheriff – Dispatch | 5402 | 151a | D |
| Frederick County Sheriff | Frederick County Sheriff – Dispatch | 5403 | 151b | D |
| Frederick County Sheriff | Frederick County Sheriff – Dispatch | 5404 | 151c | D |
| Maryland State Police | MD State Police Barrack B Operations | 5668 | 1624 | D |
| Frederick County Sheriff | Judicial | 5407 | 151f | D |
| Frederick County Sheriff | School Resource Officers | 5408 | 1520 | D |
| Frederick County Sheriff | Special | 5409 | 1521 | D |
| Maryland State Police | MD State Police Barrack B Tactical | 5669 | 1625 | D |
| Maryland State Police | MD State Police Barrack B Tactical | 5673 | 1629 | D |
10 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| City Police | Operations | 5541 | 15a5 | D Encrypted |
| City Police | Operations | 5542 | 15a6 | D Encrypted |
| City Police | Operations | 5543 | 15a7 | D Encrypted |
| City Police | Operations | 5544 | 15a8 | D Encrypted |
| City Police | City Police – Tactical Channel | 5545 | 15a9 | D Encrypted |
| City Police | City Police – Tactical Channel | 5546 | 15aa | D Encrypted |
| City Police | City Police – Tactical Channel | 5551 | 15af | D Encrypted |
| Frederick County Sheriff | FCBI | 5405 | 151d | D Encrypted |
| Frederick County Sheriff | Narcotics | 5406 | 151e | D Encrypted |
| Frederick County Sheriff | SST | 5410 | 1522 | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Green Valley.
Mt. Airy ASR · First Responders Interoperable Radio System Team (FIRST)
RFSS 1 · Site 14 (hex E) · NAC 4AD · about 4 mi away
Control 774.04375, 774.80625
Voice 769.98125, 770.19375, 770.91875, 773.78125
Montgomery Simulcast · First Responders Interoperable Radio System Team (FIRST)
RFSS 5 · Site 1 (hex 1) · NAC 4A8 · about 14 mi away
Control 773.73125, 774.41875
Voice 769.09375, 771.58125, 771.89375, 772.24375, 772.61875, 772.83125
Rockville MD · Justice Integrated Wireless Network
RFSS 1 · Site 90 (hex 5A) · NAC 717 · about 14 mi away
Control 170.6375, 170.8625, 173.9
What do these numbers mean?
- Control channel
- The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
- Voice
- The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
- Site
- One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
- RFSS (Radio Frequency Sub-System)
- A group of sites run by the same controller. Large Project 25 systems can have several.
- NAC (Network Access Code)
- A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
- Talkgroup
- A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.