Maryland Statewide Trunking Interoperability

The State of Maryland appears to have coordinated the implementation of new and upgrading trunked radio systems (especially Project 25 systems) to maintain seamless overlap in talkgroup and 7-digit radio ID numbering. This theoretically allows any talkgroup from a P25 system in Maryland to be patched onto any other P25 system in the state, and for any radio from a Maryland P25 system or coordinated county to talk on any other P25 system without fear of radio ID or talkgroup conflict.
This article serves as a benchmark for identifying new talkgroups and radio IDs based on the current sets in place.

Radio IDs

Federal Agencies

• 1000xxx = TSA BWI Airport (Plus BWI Communications) (MAA)
• 1103xxx = Pentagon Force Protection Agency (JNCR)
• 2100xxx = Naval Surface Warfare Center Indian Head (PD) [JNCR]
• 2150xxx = U.S. Naval Academy (PD/FD) [JNCR]
• 21708xx = Dept. of Defense Communications (USNA, Wash. Navy Yd.) [JNCR]

State Agencies

Maryland State Police (FiRST)

• 21271xx = Barrack M Communications
• 21280xx = Barrack M Mobiles
• 21247xx = Barrack M Portables
• 21305xx = MSP Aviation (TROOPER)?

Maryland Transportation Authority [FiRST, MAA]

• 21109xx = Police BWI Airport
• 21165xx = Communications and Base Stations
• 21166xx-21170xx = Police Portables
• 21171xx-21172xx = Miscellaneous Portables
• 21172xx-21173xx = Maintenance and Support Portables
• 21174xx = Police Commercial Vehicles Unit
• 21176xx-21178xx = Police Mobiles
• 21179xx-21182xx = Maintenance and Support Units

Maryland Aviation Administration

• 21101xx-21102xx = BWI Fire Department
• 21109xx = Martin State Airport (KMTN) Fixed Base Operator (CMARC)
• 21113xx-21114xx = BWI Airport Security

Maryland Department of General Services

• 2154xxx = DGS Police

Maryland Department of Labor, Licensing and Regulation Police

• 2165xxx = DLLR Police

Maryland Port Authority

• 2120xxx = Port Authority

Maryland Counties

Anne Arundel

Baltimore County

• 150xx = Baltimore County Communications
• 2243xxx = Baltimore County FD Mobiles
• 2247xxx = Baltimore County DPW
• 2250xxx-2251xxx = Baltimore County Police
• 2253xxx = Baltimore County FD Portables
• 22560xx = Baltimore County Sheriffs Office
• 22562xx-22563xx = Baltimore County Detention Center

Baltimore City

• 2260xxx = Baltimore City FD
• 2263xxx-2267xxx = Baltimore PD
• 227xxxx = Baltimore City Communications

Calvert

Caroline

Carroll

• 232xxxx
• 2320xxx = Carroll County FD

Cecil

Charles

• 236xxxx

Dorchester

Frederick

• 240xxxx

Garrett

Harford

• 245xxxx

Howard

• 246xxxx

Kent

• 24801xx-24802xx = Kent County FD
• 24805xx-24806xx = Kent County Sheriffs Office
• 24900xx = Kent County Communications

Montgomery

• 250xxxx

Prince George's

• 1000xxx = Prince George's County Communications
• 252xxxx

Queen Anne's

Somerset

St. Mary's

• 258xxxx (detected on the St. Mary's P25 system - 8/5/13)

Talbot

Washington

Wicomico

Worcester

Included Out of State Agencies

Pennsylvania

• 2451xxx = York County FD

Virginia

• 310xxxx = Alexandria County
• 319xxxx = Fairfax County

Washington DC

• 110xxxx = Metropolitan Police Department

Talkgroups

Only included systems are Maryland State and County P25 systems that appear to be integrated in this plan.

State Agencies

• 71xx = Maryland Transportation Authority [FiRST, MAA]
• 73xx = Maryland State Police [FiRST]
• 81xx = Maryland Tac Talkgroups [FiRST]
• 117xx = Central Maryland Area Regional Communications [CMARC] (Central MD)

Maryland Counties

Anne Arundel

Baltimore

• 94xx-95xx = Baltimore County FD (and Misc)
• 96xx = Baltimore County PD (and Misc)
• 97xx-98xx = Baltimore County Services

Baltimore City

• 90xx = Baltimore City FD
• 91xx = Baltimore Police
• 92xx = Baltimore City Services

Calvert

Caroline

Carroll

Cecil

Charles

Dorcheser

Frederick

• 540x = Frederick County Sheriffs Office
• 544x-548x = Frederick County FD
• 549x-553x = Frederick County Services

Garrett

Harford

Howard

Kent

• 128xx

Montgomery

Prince George

Queen Anne's

Somerset

St. Mary's

Talbot

Washington

• 134xx-135xx

Wicomico

Worcester