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- Menominee County (MI)
- Menominee County (WI)
- Mercer County (IL)
- Mercer County (MO)
- Mercer County (NJ)
- Mercer County (NJ) Interoperable Public Safety Radio System - Support for out of production radios
- Mercer County (NJ) Interoperable Public Safety Radio System Radio IDs
- Mercer County (NJ) Interoperable Public Safety Radio System Unknown Unconfirmed Talkgroups
- Mercer County (OH)
- Mercer County (PA)
- Mercer County (WV)
- Mercer County Emergency Management Radio System
- Mercer County Interoperable Public Safety Radio System
- Merck DMR
- Merck DMR Unknown Talkgroups
- Mercy Flight (NY)
- Meridian/Key Field (MEI) Lauderdale County (MS)
- Merrick County (NE)
- Merrimack County (NH)
- Mesa County (CO)
- Metcalfe County (KY)
- Methodist Hospital
- Methodist Hospital (TX) DMR Bandplan
- Metro
- Metro-25/MTA MRRS
- Metro-25/MTA MRRS Radio IDs
- Metro-25/MTA MRRS Unknown Talkgroups
- MetroBus
- MetroFire Mutual Aid (MA)
- Metro -- MetroBus/MetroLink (Bi-State Development Agency) St. Louis County (MO)
- Metro Area Radio Cooperative (MARC)
- Metro Toronto Convention Centre
- Metro Toronto Convention Centre Unknown Talkgroups
- Metro Washington Council of Governments
- Metrocrest Quad Cities Public Safety Radio System
- Metrolinx - GO Transit
- Metrolinx - GO Transit Maps and System Description
- Metrolinx - GO Transit Talkgroups and Band Plan
- Metrolinx - GO Transit UIDs
- Metropolitan Area Regional Radio System (MARRS)
- Metropolitan Detention Center Los Angeles
- Metropolitan Emergency Communications Agency (MECA)
- Metropolitan Entertainment Convention Authority
- Metropolitan Entertainment Convention Authority System Research
- Metropolitan Government Of Nashville and Davidson County (Motorola)
- Metropolitan Government Of Nashville and Davidson County (P25)
- Metropolitan Government of Nashville and Davidson County (Motorola) User IDs
- Metropolitan Government of Nashville and Davidson County (P25) User IDs
- Metropolitan PD, Wash DC
- Metropolitan Police (Defunct), MA Apparatus
- Metropolitan Police Department, Washington (DC)
- Metropolitan School District of Washington Township
- Metropolitan School District of Washington Township Talkgroup Research
- Metropolitan Transit Authority of Harris County MetroRail Unit IDs
- Metropolitan Transportation Authority (NY)
- Metropolitan Washington Airports Authority (MWAA) Monitoring
- Metropolitan Washington Airports Authority (Motorola)
- Metropolitan Washington Airports Authority (P25)
- MiWay (formerly Mississauga Transit)
- Miami-Dade County (FL)
- Miami-Dade County (FL) Amateur Radio Repeaters
- Miami-Dade County (FL) Apparatus
- Miami-Dade County (FL) Drawbridges
- Miami-Dade County (FL) Fire/Rescue/EMS Brevity Codes
- Miami-Dade County (FL) Fire/Rescue/EMS Stations and Tones
- Miami-Dade County (FL) Law Enforcement
- Miami-Dade County (FL) Miami City Public Safety Codes
- Miami-Dade County (FL) Public Services Unknown Talkgroups
- Miami-Dade County Public Services
- Miami (City) Public Safety
- Miami (ZMA) Air Route Traffic Control Center
- Miami County (EDACS)
- Miami County (OH)
- Miami Subs Grill (Palm Beach Co.)
- Miami Valley Gaming and Racing
- Michigan's Public Safety Communications System (MPSCS)
- Michigan's Public Safety Communications System (MPSCS) RIDs
- Michigan's Public Safety Communications System (MPSCS) Radio ID Structure
- Michigan's Public Safety Communications System (MPSCS) Zone Number
- Michigan(US)
- Michigan (US)
- Michigan Counties
- Michigan MilAir Reference
- Michigan Railroads (MI)
- Michigan Sports
- Michigan State Police
- Michigan State University
- Microwave
- Mid-Atlantic Digital Radio Network
- Mid-Atlantic Digital Radio Network Site Neighbor Information
- Mid-Atlantic Digital Radio Network Site Research and Color Codes
- Mid-Atlantic Digital Radio Network Unconfirmed Talkgroups
- Mid-Atlantic Digital Radio Network Unit IDs
- Mid-North Coast Security Companies Mid - North Coast (NC) Division (NSW)
- Mid - North Coast (NC) Division (NSW)
- Mid Air Operations
- Middle Tennessee Regional Trunked Radio System
- Middlesex County
- Middlesex County (CT)
- Middlesex County (CT) Fire Tone Outs
- Middlesex County (MA)
- Middlesex County (MA) Bridges
- Middlesex County (NJ)
- Middlesex County (NJ) Bridges
- Middlesex County (NJ) Edison Twp
- Middlesex County (ON)
- Middlesex County (VA)
- Middleton Field (GZH) Conecuh County (AL)
- Middletown
- Middletown Radio IDs
- Middletown Unknown Talkgroups
- Midland County (MI)
- Midland County (TX)
- Midland International Airport (MAF) Midland County (TX)
- Midwest League
- Mifflin County (PA)
- Milam County (TX)
- Milcom Receiving Equipment
- Milcom Web Pages and Mailing Lists
- Military & National Guard Palo Pinto County (TX)
- Military & National Guard Parker County (TX)
- Military & State Defense (TX)
- Military Agencies (MN)
- Military Aviation (MILAIR) (MS)
- Military Aviation (MILAIR) NC Non-County Specific (NC)
- Military Frequencies (NY)
- Military Frequencies Hennepin County (MN)
- Military Maricopa County (AZ)
- Military Monitoring Glossary
- Military Satellites - Other
- Millar Western Forest Products
- Millard County (UT)
- Mille Lacs County (MN)
- Mille Lacs County (MN) Radio IDs on ARMER
- MillerCoors Brewing Company (Trenton)
- MillerCoors Brewing Company (Trenton) Talkgroups Research
- Miller County (AR)
- Miller County (MO)
- Miller Transit(York Region)
- Milton Transit
- Milwaukee County (Agency) Milwaukee County (WI)
- Milwaukee County (WI)
- Milwaukee Milwaukee County (WI)
- Milwaukee Milwaukee County (WI) FD Apparatus and Stations
- Milwaukee Milwaukee County (WI) PD Codes
- Milwaukee Milwaukee County (WI) PD Units
- Milwaukee Public Safety and Services (P25)
- Milwaukee Public Safety and Services (P25) Trunking Research
- Milwaukee World Festivals (Summerfest)
- Milwaukee World Festivals (Summerfest) Talkgroups
- Minburn County (AB)
- Mineral County (CO)
- Mineral County (WV)
- Mineral Wells Airport (MWL) Palo Pinto County (TX)
- Mining Franklin County (TN)
- Ministry of Community Safety and Correctional Services (ON)
- Ministry of Health (ON)
- Ministry of Natural Resources (ON)
- Ministry of Transportation (MTQ) (QC)
- Ministry of Transportation (ON)
- Ministry of the Environment (ON)
- Minneapolis-St. Paul International Airport (MSP) Hennepin County (MN)
- Minneapolis (ZMP) Air Route Traffic Control Center
- Minneapolis St.Paul Fire Tone Outs
- Minnehaha County (SD)
- Minnesota(US)
- Minnesota (US)
- Minnesota Counties
- Minnesota Mining and Manufacturing (3M)
- Minnesota Sports
- Minute Man National Historic Park (MA)
- Mirage Hotel and Casino (800 MHz)
- Mirage Hotel and Casino (800 Mhz) Unknown Talkgroups
- Misc Sounder Waterfall
- Miscellaneous Frequencies (NY)
- Missaukee County (MI)
- Mississauga Fleetnet Tower
- Mississauga Transit
- Mississippi(US)
- Mississippi (US)
- Mississippi Counties
- Mississippi County (MO)
- Mississippi County AR
- Mississippi Images and Maps
- Mississippi River
- Mississippi Sports
- Mississippi State Agencies (MS)
- Mississippi Wireless Information Network (MSWIN)
- Mississippi Wireless Integrated Network (MSWIN)
- Missoula County (MT)
- Missouri(US)
- Missouri (US)
- Missouri BrandMeister DMR
- Missouri Communications Companies
- Missouri Counties
- Missouri Department of Conservation (MO)
- Missouri Department of Corrections (MO)
- Missouri Department of Public Safety (DPS) (MO)
- Missouri Department of Public Safety (MO)
- Missouri Department of Public Safety (MO) Legacy Info
- Missouri Department of Transportation (MODOT) (MO)
- Missouri Sports
- Missouri Statewide/Areawide Agencies/Companies
- Missouri Statewide Digital (P25)
- Missouri Statewide Digital (P25) Radio IDs
- Missouri Statewide Digital (P25) St Louis County Applications
- Missouri Statewide Interoperable Network (MOSWIN)
- Missouri Statewide Wireless Interoperable Network (MOSWIN)
- Mitchell County (IA)
- Mitchell County (NC)
- MnDPS
- MnDPS State Patrol
- MnDPS State Patrol RID
- Mo-Comm Electronics - 800 MHz (Columbia)
- MobiCommunications and Electronics (Chattanooga UHF) Unknown Talkgroups
- Mobilcomm (TRBO)
- Mobilcomm (TRBO) Talkgroups Research
- Mobile Business - Toronto (LTR-B) Talkgroup Information
- Mobile Business - Toronto (LTR - A)
- Mobile Business - Toronto (LTR - B)
- Mobile Communications America
- Mobile Communications America (Newport News Capacity Plus)
- Mobile Communications America (Newport News Capacity Plus) Frequency Research
- Mobile Communications America (Newport News Capacity Plus) Unknown Talkgroups
- Mobile Communications America Unknown Talkgroups
- Mobile Communications of North Florida
- Mobile Communications of North Florida (DMR)
- Mobile Communications of North Florida Unknown Talkgroups
- Mobile County
- Mobile County (AL)
- Mobile County (AL) Drawbridges
- Mobile County (AL) TRS Unidentified Talkgroups
- Mobile Phone of Texas (Palo Pinto)
- Mobile Phone of Texas (Palo Pinto) Unknown Talkgroups
- Mobile Radio Engineering (NXDN)
- Mobile Radio Engineering (NXDN) DSDPlus.frequencies
- Mobile Regional Airport (MOB) Mobile County (AL)
- Mobile Talk Wireless
- Mobiletech Communications
- Mobiletech Communications (NXDN)
- Mobiletech Communications (NXDN) Unknown Talkgroups
- Mobiletech Communications Data Network South Bristol
- Mobiletech Communications Fleetsync Information
- Mobiletech Communications Talkgroups
- Modulation
- Modulation Methods
- Moffat County (CO)
- Mohave County (AZ)
- Mohawk Ambulance Service Tone Outs
- Moline IL Public Works
- Moline IL Public Works RID/UID Research
- Moline IL Public Works Talkgroup Research
- Moncton Commercial
- Moncton Commercial Unknown Talkgroups
- Moncton Public Safety
- Moncton Public Safety Unknown Talkgroups
- Moniteau County (MO)
- Monitoring Prince George's County (MD)
- Monmouth County (NJ)
- Monmouth County (NJ) Bridges
- Monmouth County (NJ) EMS Radio IDs
- Monmouth County (NJ) EMS Squads
- Monmouth County (NJ) EMS Tones
- Monmouth County (NJ) Emergency Management Radio IDs
- Monmouth County (NJ) Fire & EMS Unit Identifiers
- Monmouth County (NJ) Fire Radio IDs
- Monmouth County (NJ) Fire Stations
- Monmouth County (NJ) Fire Tone Outs
- Monmouth County (NJ) Fire and EMS (By Dist.)
- Monmouth County (NJ) Law Enforcement Districts
- Monmouth County (NJ) Law Enforcement Radio IDs
- Monmouth County (NJ) MONOC Paramedics
- Monmouth County (NJ) Police 10 Codes
- Monmouth County (NJ) Robert Wood Johnson Barnabas Mobile Health and Hackensack Meridian Health Paramedics
- Monmouth County (NJ) Services Radio IDs
- Monmouth County (NJ) Specialized Teams
- Monmouth County (NJ) Unidentified Unconfirmed Talkgroups
- Monmouth County (NJ) Unknown Radio IDs
- Monmouth County Public Safety
- Mono County (CA)
- Monona County (IA)
- Monongalia County (WV)
- Monroe/Ontario Counties
- Monroe/Ontario County
- Monroe/Ontario County Unknown Talkgroups
- Monroe Ambulance (NY)
- Monroe County (AR)
- Monroe County (AR) Drawbridges
- Monroe County (FL)
- Monroe County (FL) Drawbridges
- Monroe County (IL)
- Monroe County (IL) Unit IDs and Lists
- Monroe County (IN)
- Monroe County (MI)
- Monroe County (MI) Fire/EMS
- Monroe County (MI) Law Enforcement
- Monroe County (MO)
- Monroe County (MS)
- Monroe County (NY)
- Monroe County (NY) Amateur Radio
- Monroe County (NY) Amateur Radio Repeaters
- Monroe County (NY) Ambulances
- Monroe County (NY) Canal Locks/Liftbridges
- Monroe County (NY) Colleges and Universities
- Monroe County (NY) Fire Tone Outs
- Monroe County (NY) Fire and EMS Call Signs
- Monroe County (NY) Firefighting
- Monroe County (NY) Law Enforcement
- Monroe County (NY) Rochester City
- Monroe County (NY) Rochester City FD
- Monroe County (NY) Rochester City FD Apparatus
- Monroe County (NY) Rochester City PD
- Monroe County (NY) Sheriff
- Monroe County (NY) Towns and Villages Unit Numbers
- Monroe County (OH)
- Monroe County (PA)
- Monroe County (PA) EMS Patient Codes
- Monroe County (PA) Police/Fire ID's
- Monroe County (PA) Police Codes
- Monroe County (TN)
- Monroe County (WI)
- Monroe County (WV)
- Monroe Regional Airport (MLU) Ouachita Parish (LA)
- Montague County (TX)
- Montana(US)
- Montana (US)
- Montana Counties
- Montana Federal (MT)
- Montana Interoperable Public Safety Radio System Unknown Talkgroups
- Montana Mutual Aid & Common Frequecies (MT)
- Montana Public Safety Communications System
- Montana Railroads (MT)
- Montana Statewide Interoperable Public Safety Radio System
- Montcalm County (MI)
- Monteregie County (QC)
- Monterey County (CA)
- Montezuma County (CO)
- Montgomery Count , MD (P25) Fire/Rescue Talkgroups to Find
- Montgomery County
- Montgomery County, MD
- Montgomery County, MD (P16)
- Montgomery County, MD (P25)
- Montgomery County, MD (P25) Radio IDs and Patterns
- Montgomery County, MD (P25) Unidentified Talkgroup Information
- Montgomery County (AL)