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Federal Harris County (TX)


Contents

Unidentified Frequencies

Unidentified federal frequencies monitored in Harris County, Texas:

VHF-High

141.6125     FFF NAC encrypted?
162.2375 M     CSQ   analog, CC hit around the Eastex and 610, informal conversation, mobile-to-mobile chit chat on freeways in downtown Houston
162.7875 M   839 NAC Marshals? encrypted
163.1    M           DES
163.1125 M   496 NAC clear voice
163.65       052 NAC ICE? P25 encrypted (heard during FBI fugitive search in Fort Bend County area)
163.7    M?  164 NAC encrypted (active same morning as FBI 173.1 NAC 167 repeater output)
163.7    M  206.5 PL voice
163.8125 M   864 NAC encrypted
164.45   M  151.4 PL car-to-car talk
164.55   M           OCDETF? DES
165.025  M     CSQ   heard during Hurricane Gustav
165.075  M?  293 NAC Marshals? encrypted
165.6375 M  100.0 PL ?
165.6875 M  100.0 PL CBP new Net input?
165.825  M   060 NAC ICE? (used during NCAA Final Four 2011)
166.4625 M     CSQ   Federal Common (analog unencrypted and DES encryption)
166.4875 M  100.0 PL CBP new Net input?
166.5875 M  100.0 PL CBP new Net input?
166.5625 M  192.8 PL Department of Agriculture Wildlife Services - distributing rabies vaccine from helicopters in Fort Bend County area 9/17/2013
167.2125             EMWIN Data?
167.5125 M?          FBI? DES?
167.5375 M           FBI? DES
168.35   M           DES, analog voice
168.35   M   100 NAC Department of Health and Human Services Secretary protective detail
168.6125 M           very weak/broken voice
168.7    M     CSQ   National Incident Radio Support Cache (NIRSC) Command 1? - analog voice and DES, surveillance
168.8625 M           OCDETF? DES
169.325  I?  293 NAC FAA input?
169.6375             data bursts, P25?
170.725  M           analog simplex voice during Hurricane Gustav
170.8    M   293 NAC Marshals? encrypted
170.825  M           FBI? DES
171.025  R           IFLOWS/Harris County Flood Alert System - League City repeater output, unconfirmed
171.2    M           DOE? NEST? - brief analog voice (NCAA Final Four 2011), also P25 or intermod?
171.3125             trunked control channel? very weak in Houston during good conditions
171.6125 M   864 NAC ?
172.0625 M?          P25?
172.9    R     CSQ   somewhere near IAH airport
172.95   R?  293 NAC FAA?
173.05   S?          chirping sound data
173.1625 R?          P25?
173.7125 M?  293 NAC clear voice, aircraft?
173.875  R   94.8 PL US Capitol Police "Travel 3" (Giffords detail at Hermann TIRR)
173.8875 M?          ATFE Tactical 6? - P25 encrypted

The Organized Crime Drug Enforcement Task Force (OCDETF) is a multi-agency federal task force (commonly associated with the FBI although many other agencies participate). The DES frequencies above remain in use after the FBI's conversion to P25 in the Houston area. These frequencies may be used by OCDETF because they may be maintained for compatibility with other agencies on VHF-high that have not yet converted to P25 (e.g., CBP/ICE). Some of these frequencies are also reported as nationwide FBI frequencies.

Presumed Obsolete

167.5125 R? 167.9 PL FBI? lots of key-ups with weak signal (same time as 173.025), feedback/squeaking, weak voice
168.925  R  167.9 PL reported in MT Fed Files
170.025  R? 167.9 PL FBI? weak, open mic/keyed-up dead air/static
171.175  R  167.9 PL FBI? near IAH airport, open mic/keyed-up dead air (this may be obsolete, now P25)
173.025  R? 167.9 PL FBI? lots of key-ups with weak signal (same time as 167.5125), DES
173.1    R? 167.9 PL FBI? open mic dead air, DES

UHF

406.175      293 NAC encrypted
411.7875 M?  293 NAC Coast Guard? keyed-up for 3 seconds with a high pitch tone (NCAA Final Four 2011)
412.4375    206.5 PL constant dead carrier around UH Clear Lake/JSC area
414.5625 M   168 NAC encrypted
414.5625 M   169 NAC encrypted
414.75   M   169 NAC encrypted

Federal Aviation

Bases

  • Army National Guard (Apache helicopters) - Ellington International Airport (Houston)
  • Army Reserve (Apache helicopters) - Lone Star Executive Airport (Conroe)
  • CBP - Lone Star Executive Airport (Conroe)
  • Coast Guard - Ellington International Airport (Houston)
  • DEA - Lone Star Executive Airport (Conroe) - source source source
  • FBI - West Houston Airport (Houston) - identified via monitoring
  • NASA - Ellington International Airport (Houston)

CBP Aircraft

The following CBP aircraft have been noted operating the Houston region.

Related Links


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