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- Laurel County (KY)
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- Lewis University (Romeoville)
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- Lexington-Fayette Urban County Government (P25)
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- Lexington Call Mobile
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- Line A
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- Liquidsoap
- List of M/A-COM Radio Feature Codes
- Listening to AFRN in Baldwin County
- Listening to AIRS in Baldwin County
- Listening to South Sound 911 with a RTL-SDR
- Listening to the Bay Minette, Daphne, Foley, Robertsdale System
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- Little Creek Naval Base Virginia Beach City (VA)
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- Loops
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- Los Alamos National Laboratory
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- Los Angeles County (CA) NASA JPL FD
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- Los Angeles County (CA) Sheriffs Department
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- Los Angeles County (CA) Vernon FD
- Los Angeles County (CA) Walt Disney Studios FD
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- Los Angeles County (CA) West Covina FD
- Los Angeles County Police Callsigns
- Louchart Enterprises (800 MHz)
- Louchart Enterprises MOTOTRBO System
- Louchart Enterprises MOTOTRBO System Talkgroup Research
- Loudon County (TN)
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- Loudoun County (VA) Apparatus
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- Loudoun County Public Schools
- Loudoun County Public Schools Unmatched Sites
- Louisa County (VA)
- Louisiana(US)
- Louisiana (US)
- Louisiana Parishes
- Louisiana Sports
- Louisiana State Police UIDs
- Louisiana Wireless Information Network (LWIN)
- Louisville Emergency Communications Network: MetroSafe
- Louisville Emergency Communications Network: Metrosafe Transmit Sites
- Low Power Units
- Lowell National Historic Park (MA)
- Lower Colorado River Authority (LCRA)
- Lower Colorado River Authority (LCRA)/LCRA LIDs
- Lower Colorado River Authority (LCRA)/LCRA Patches
- Lower Colorado River Authority (LCRA)/LCRA Unidentified TGs
- Lower Colorado River Authority (LCRA) OpenSky
- Lower Colorado River Authority (LCRA) OpenSky System Information
- Lower Colorado River Authority (LCRA) P25
- Lower Colorado River Authority (LCRA) P25 Site Testing
- Lower Merion Township
- Lower Merion Township Unknown Talkgroups
- Lower Rio Grande Valley Regional Radio System (LRGVRRS)
- Lower Rio Grande Valley Regional Radio System (LRGVRRS) talkgroup research
- Lowndes County (AL)
- Lowndes County (GA)
- Lowndes County (MS)
- Lowndes County Public Safety
- Lowndes County Public Safety P25
- Lowndes County Public Safety Radio IDs
- Lowndes County Public Safety Unit Numbering
- Loyola University Medical Center (Maywood)
- Lubbock / Lubbock County
- Lubbock County (TX)
- Lucas County (OH)
- Lucas County (OH) Public Safety Radio IDs
- Lucas County (OH) Public Safety Radio Template
- Lucas Oil - Late Models
- Luis Munoz Marin International Airport (SJU) Carolina County (PR)
- Lumière Place Casino and Hotels (St. Louis)
- Lumière Place Casino and Hotels (St. Louis) LCN Frequency Information
- Lumière Place Casino and Hotels (St. Louis) Talkgroup Research
- Lumière Place Casino and Hotels (St. Louis) Units and Operations
- Lumpkin County (GA)
- Lunenburg County (NS)
- Luzerne County (PA)
- Luzerne County (PA) 10-Codes
- Luzerne County (PA) EMS Units
- Luzerne County (PA) Fire/E.M.S. Sta. Locations
- Luzerne County (PA) Police Fire EMS Stations Units Zones
- Lycoming County (PA)
- Lynchburg City (VA)
- Lynchburg City (VA) Apparatus
- Lyon County (IA)
- Lyon County (MN)
- Lyondell Citgo Refining Company
- M/A-COM Radios
- M/A-COM Radios on Ebay
- M1225
- M2-Montreal Sub
- M4-Mon Sub
- M7-Middletown Sub
- M8-Richmond Sub
- MA/COM KRD Model Number Breakdown
- MABAS Div III Unit IDs
- MABAS Div II Unit IDs
- MABAS Div IV Unit IDs
- MABAS Div IX
- MABAS Div I Unit IDs
- MABAS Div VI Unit IDs
- MABAS Div V Unit IDs
- MABAS Div XIII Unit IDs
- MABAS Div XII Unit IDs
- MABAS Div XIV Unit IDs
- MABAS Div XIX Unit IDs
- MABAS Div XI Unit IDs
- MABAS Div XVIII Unit IDs
- MABAS Div XVI Unit IDs
- MABAS Div XV Unit IDs
- MABAS Div XXII Unit IDs
- MABAS Div XXIV Unit IDs
- MABAS Div XXI Unit IDs
- MABAS Div XXVII Unit IDs
- MABAS Div XXXVIII Unit IDs
- MABAS Div XX Unit IDs
- MABAS Div X Unit IDs
- MAGNA International
- MAGNA International Unknown Talkgroups
- MARCER
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- MASS Transportation Authority
- MB-Middleboro Sub
- MBS Airport Saginaw County (MI)
- MC3361
- MCFRS ( MD )
- MCS Digital
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- MDC1200
- MD ANG 175th Wing
- ME-Metropolitan Sub
- MEDCOM (MI)