About Flower Hill Police Frequencies
- 3 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 (P25), 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; Integrated Wireless Network (IWN) National Capital Region: 3 talkgroups; Justice Integrated Wireless Network: 54 talkgroups; Montgomery County, MD: 26 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 Flower Hill, start with the Rockville MD site of Justice Integrated Wireless Network, about 2 miles away. Its control channels: 170.6375, 170.8625, 173.9 MHz.
- 155 listed entries are marked encrypted. No scanner can decode encrypted audio.
Montgomery County channels that also cover Flower Hill
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| M-NCPPC Parks (Montgomery County Division) Police | M-NCPPC Parks (Montgomery County Division) Police – Dispatch /Operations (Simulcast from Montgomery County TRS) | 151.2800 In 151.1600 | 118.8 PL | FMN | KIF677 |
Talk-around & Car-to-Car
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Montgomery County Sheriff | G11 Montgomery County Direct | 851.5125 | 67.0 PL | FMN | WPWB302 |
| Montgomery County Sheriff | G12 Montgomery County Direct | 851.8375 | 156.7 PL | FMN | WPWB302 |
| Montgomery County Sheriff | A16/F14/G10 Police Direct | 852.4875 | NAC 293 | P25 | WPWB302 |
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 |
Integrated Wireless Network (IWN) National Capital Region
3 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Surveillance | Surveillance (partial encryption) | 35650 | 8b42 | D Encrypted |
| Surveillance | Surveillance (partial encryption) | 35651 | 8b43 | D Encrypted |
| Surveillance | Surveillance (partial encryption) | 35653 | 8b45 | D Encrypted |
Justice Integrated Wireless Network
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Washington State Patrol | D1 Olympia | 59108 | e6e4 | D |
| Washington State Patrol | D1 East Pierce | 59109 | e6e5 | D |
| Washington State Patrol | D1 West Pierce Tacoma | 59110 | e6e6 | D |
| Washington State Patrol | D1 Dispatch A11 | 59111 | e6e7 | D |
| Washington State Patrol | D2 Seattle Metro | 59208 | e748 | D |
| Washington State Patrol | D2 North King | 59209 | e749 | D |
| Washington State Patrol | D2 South King | 59210 | e74a | D |
| Washington State Patrol | D2 Seattle Area | 59211 | e74b | D |
| Washington State Patrol | D2 Dispatch A12 | 59212 | e74c | D |
| Washington State Patrol | D3 Kennewick Area | 59308 | e7ac | D |
| Washington State Patrol | D3 Dispatch A09 | 59309 | e7ad | D |
| Washington State Patrol | D3 Dispatch A10 | 59310 | e7ae | D |
| Washington State Patrol | D3 Union Gap Area | 59311 | e7af | D |
| Washington State Patrol | D4 Colville Area | 59408 | e810 | D |
| Washington State Patrol | D4 Spokane Area | 59409 | e811 | D |
| Washington State Patrol | D4 Colfax Area | 59410 | e812 | D |
| Washington State Patrol | D5 Dispatch A08 | 59508 | e874 | D |
| Washington State Patrol | D5 Kelso Area | 59509 | e875 | D |
| Washington State Patrol | D5 Vancouver Area | 59510 | e876 | D |
| Washington State Patrol | D6 Dispatch A08 | 59608 | e8d8 | D |
| Washington State Patrol | D6 Dispatch Ellesnburg | 59609 | e8d9 | D |
| Washington State Patrol | D6 Ephrata Area | 59610 | e8da | D |
| Washington State Patrol | D6 Dispatch A11 | 59611 | e8db | D |
| Washington State Patrol | D6 Wenatchee Area | 59612 | e8dc | D |
| Washington State Patrol | D7 Bellingham Area | 59708 | e93c | D |
| Washington State Patrol | D7 West Snohomish County | 59709 | e93d | D |
| Washington State Patrol | D7 Mount Vernon Area | 59710 | e93e | D |
| Washington State Patrol | D7 Dispatch A11 | 59711 | e93f | D |
| Washington State Patrol | D8 Dispatch Kitsap/Mason | 59808 | e9a0 | D |
| Washington State Patrol | D8 Dispatch A09 | 59809 | e9a1 | D |
| Washington State Patrol | D8 Dispatch A10 | 59810 | e9a2 | D |
| Washington State Patrol | D2 Seattle Area Tactical | 59206 | e746 | D |
| Washington State Patrol | D1 Car | 59101 | e6dd | D |
| Washington State Patrol | D1 Car | 59102 | e6de | D |
| Washington State Patrol | D1 Car | 59103 | e6df | D |
| Washington State Patrol | D2 Car | 59201 | e741 | D |
| Washington State Patrol | D2 Car 2 Metro | 59202 | e742 | D |
| Washington State Patrol | D2 Car | 59203 | e743 | D |
| Washington State Patrol | D3 Car | 59301 | e7a5 | D |
| Washington State Patrol | D3 Car | 59302 | e7a6 | D |
| Washington State Patrol | D4 Car | 59401 | e809 | D |
| Washington State Patrol | D4 Car | 59402 | e80a | D |
| Washington State Patrol | D5 Car | 59501 | e86d | D |
| Washington State Patrol | D5 Car | 59502 | e86e | D |
| Washington State Patrol | D6 Car | 59601 | e8d1 | D |
| Washington State Patrol | D6 Car | 59602 | e8d2 | D |
| Washington State Patrol | D7 Car | 59701 | e935 | D |
| Washington State Patrol | D7 Car | 59702 | e936 | D |
| Washington State Patrol | D8 Car | 59801 | e999 | D |
| Washington State Patrol | D8 Car | 59802 | e99a | D |
| Washington State Patrol | WSP Academy Olympia | 59950 | ea2e | D |
3 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Federal Bureau of Investigation | WA State Operations | 13103 | 332f | D Encrypted |
| Federal Protective Service | FPS WA ops | 13638 | 3546 | D Encrypted |
| Federal Protective Service | Oregon Operations | 13639 | 3547 | D Encrypted |
Montgomery County, MD
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Maryland State Police | Rockville (Barrack N) | 6595 | 19c3 | T |
| Maryland Transportation Authority | Intercounty Connector – Police | 6605 | 19cd | T |
| National Institute of Standards and Technology | 7N2 Police | 6610 | 19d2 | T |
| Washington Suburban Sanitary Commission | Washington Suburban Sanitary Commission – Dispatch (H2) (also MD Natural Resources Police) | 6800 | 1a90 | T |
| Montgomery County Sheriff | G10 Animal Services | 6220 | 184c | T |
| Montgomery County Sheriff | Training | 6400 | 1900 | T |
| Montgomery County Sheriff | Training | 6405 | 1905 | T |
| Montgomery County Sheriff | Training | 6410 | 190a | T |
| Montgomery County Sheriff | Training | 6565 | 19a5 | T |
| Montgomery County Sheriff | Training | 6570 | 19aa | T |
| Montgomery County Sheriff | Training | 6575 | 19af | T |
| Montgomery County Sheriff | Training | 6580 | 19b4 | T |
| Montgomery County Sheriff | Training | 6585 | 19b9 | T |
| Montgomery County Sheriff | Training | 6590 | 19be | T |
| Correction and Rehabilitation | Correctional Facility Janitors | 7645 | 1ddd | T |
| Correction and Rehabilitation | Correctional Facility 1 Primary | 7655 | 1de7 | T |
| Correction and Rehabilitation | Correctional Facility 2 Perimeter | 7660 | 1dec | T |
| Correction and Rehabilitation | Correctional Facility Maintenance | 7665 | 1df1 | T |
| Correction and Rehabilitation | Detention Center 1 Primary | 7670 | 1df6 | T |
| Correction and Rehabilitation | Detention Center 2 Perimeter | 7675 | 1dfb | T |
6 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Maryland Department of Natural Resources | Natural Resources Police – Area (Baltimore/Carroll/Howard/Montgomery) | 6488 | 1958 | T Encrypted |
| Maryland-National Capital Park and Planning Commission | Maryland-National Capital Park and Planning Commission – Dispatch | 6475 | 194b | T Encrypted |
| Montgomery County Sheriff | B10 Rockville Police Dispatch | 6235 | 185b | T Encrypted |
| Montgomery County Sheriff | A12 Takoma Park Police Dispatch | 6375 | 18e7 | T Encrypted |
| Montgomery County Sheriff | A11 Chevy Chase Village Police Dispatch | 6535 | 1987 | T Encrypted |
| Montgomery County Sheriff | A15 Incident 10 – Tactical | 6125 | 17ed | T Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Flower Hill.
Rockville MD · Justice Integrated Wireless Network
RFSS 1 · Site 90 (hex 5A) · NAC 717 · about 2 mi away
Control 170.6375, 170.8625, 173.9
Simulcast · Montgomery County, MD
RFSS 1 · Site 2 (hex 2) · NAC 8E2 · about 2 mi away
Control 853.6875, 853.8625, 853.8875, 853.9375
Voice 851.2125, 851.275, 851.3375, 851.4875, 851.65, 852.8375, 852.8875, 852.9125, 853.1125, 853.1625, 853.275, 853.3625, 853.3875, 853.4375, 853.6125, 853.6375
Montgomery Simulcast · First Responders Interoperable Radio System Team (FIRST)
RFSS 5 · Site 1 (hex 1) · NAC 4A8 · about 2 mi away
Control 773.73125, 774.41875
Voice 769.09375, 771.58125, 771.89375, 772.24375, 772.61875, 772.83125
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.
Common questions
What frequency do the police use in Flower Hill?
We do not have a dispatch channel listed specifically for Flower Hill. County-level dispatch channels in the same county: M-NCPPC Parks (Montgomery County Division) Police 151.2800 MHz (118.8 PL).