These CTCSS's (PL's) may help you identify a Federal Agency.

All known PL's are on this list, not all radio' have all of these subaudable tones.


 67.0 U.S. Postal Service
 69.3
 71.9 Federal Aviation Administration
 74.4
 77.0 Department Of Energy
 79.7
 82.5 U.S. Postal Service
 85.4
 91.5 U.S. Postal Service
 94.8 Bureau Of Land Management
 94.8 Department Of Energy (Nest Teams)
 97.4 U.S. Postal Service
100.0 Bureau Of Alcohol, Tobacco & Firearms
100.0 Bureau Of Indian Affairs
100.0 Civil Air Patrol "Nationwide Common"
100.0 Department Of Justice
100.0 Immigration & Naturalization Service
100.0 Internal Revenue Service
100.0 U.S. Customs
100.0 U.S. Postal Service
103.5 Army Corps of Engineers
103.5 Bureau Of Indian Affairs
103.5 Central Intelligence Agency
103.5 Department Of Agriculture
103.5 Federal Law Enforcement Training Center 
103.5 Gsa Federal Supply Service
103.5 National Highway Traffic Administration
103.5 U.S. Marshals Service
103.5 U.S. Park Police
103.5 U.S. Postal Service (Atlanta)
103.5 U.S. Secret Service
107.2 Defense Protection Service
107.2 Department Of Agriculture
107.2 U.S. Capitol Police
107.2 U.S. Postal Service
110.9 Department Of Geological Survey
110.9 U.S. Postal Service
114.8 Environmental Protection Agency
114.8 U.S. Postal Service
118.8 Federal Emergency Management Agency
118.8 U.S. Capitol Police
123.0 Bureau Of Alcohol, Tobacco & Firearms
123.0 Bureau Of Indian Affairs
123.0 Department Of Veterans Affairs
123.0 Immigration & Naturalization Service
123.0 Institute Of Standards & Technology
123.0 Internal Revenue Service
123.0 IRS/DEA Shared Frequencies (Surveillance)
123.0 U.S. Customs
127.3 Agricultural Research Service
127.3 Bureau Of Export Administration
127.3 Department Of Commerce
127.3 Department Of Energy
127.3 Department Of Veterans Affairs
127.3 Federal Reserve Banking System
127.3 General Services Administration
127.3 Immigration & Naturalization Service
127.3 Nuclear Regulatory Commission
127.3 U.S. Air Force (ANG) (OSI)
127.3 U.S. Capitol Police
127.3 U.S. Marshals Service
127.3 U.S. Park Police
127.3 U.S. Supreme Court
131.8 Central Intelligence Agency
131.8 Federal Reserve Banking System
131.8 Internal Revenue Service
131.8 Internal Revenue Service
131.8 Walter Reed AMC Security
136.5 Federal Aviation Administration
136.5 U.S. Geological Survey
136.5 U.S. Marshals Service
136.5 U.S. Postal Service
141.3 U.S. Park Police
146.2 Department Of Veterans Affairs
146.2 Federal Aviation Administration
146.2 General Services Administration (Atlanta)
146.2 U.S. Air Force (ANG)
146.2 U.S. Capitol Police
146.2 U.S. Fish & Wildlife
146.2 U.S. Marshals Service
146.2 U.S. Park Police
151.4 Federal Law Enforcement Training Center
151.4 Immigration & Naturalization Service
151.4 Military
151.4 U.S. Air Force (ANG)
151.4 U.S. Department of State (Bureau Of Diplomatic Security)
156.7 Central Intelligence Agency
156.7 Drug Enforcement Agency
156.7 Federal Aviation Administration
156.7 Federal Bureau Of Investigation
156.7 Federal Executive Board
156.7 Internal Revenue Service
156.7 IRS/DEA Shared Frequencies (Surveillance)
156.7 National Marine Fisheries
156.7 U.S. Attorney
156.7 U.S. Capitol Police
156.7 U.S. Postal Service
159.8
162.2
162.5
167.9 Bureau Of Alcohol, Tobacco & Firearms
167.9 Bureau Of Alcohol, Tobacco & Firearms (OCDETF)
167.9 Bureau Of Indian Affairs
167.9 Department Of Energy (Nuclear Material Security)
167.9 Department Of Justice
167.9 Federal Bureau Of Investigation
167.9 Federal Emergency Management Agency
167.9 Health & Human Services
167.9 Immigration & Naturalization Service
167.9 U.S. Marshals Service
171.3
173.8 Federal Communications Commission
177.3
179.9
183.5 U.S. Air Force (ANG)
186.2 U.S. Marshals Service
189.9
192.8 Bureau Of Alcohol, Tobacco & Firearms
192.8 Federal Communications Commission
192.8 U.S. Marshals Service
199.5
203.5 U.S. Marshals Service
206.5 Immigration & Naturalization Service
206.5 National Security Agency
210.7
218.1
225.7
229.1
233.6 
241.8 
250.3
254.1