Two trunked radio systems provide ground communications within the vast area of the NTTR (Nevada Test and Training Range) as well as Area 51, and Nellis/Creech AFB. Trunked radio systems provide more efficient use of a given number of frequencies than conventional repeater systems. The systems are using frequencies in the UHF band, 380-399 MHz and 406.1-420 MHz. Both systems use the APCO (Association of Public Safety Communications Officials) Project 25 (or P25) standard. They can be monitored with modern Trunking Scanners capable of decoding APCO P25 systems. However, the audio of some talkgroups of the NNSS system and of all groups of the NTTR system is encrypted and can not be decoded with commercial scanners. Each system has several repeater sites across the NTTR. All frequencies are in MHz, unless otherwise noted.

History: Around 2006 two trunking systems were set up mostly within the NTTR to improve communication within the vast area. Both operated in the government exclusive 406.1-420MHz band reserved for mobile communications. One system covered the NNSS as well as Nellis and Creech AFB. It used a Motorola standard. Most transmissions on this system could be monitored with modern trunking scanners. The other system covered the NTTR including Area 51 and Basecamp. It used the GE EDACS standard with encryption. Transmissions on this system could not be decoded with commercial scanners.

Around 2012-2013 the EDACS system covering the NTTR was replaced by an APCO P25 system operating in the 380-399MHz band. This new system used the same locations for repeater sites and all talkgroups are encrypted.

Around 2017-2018 the NNSS Motorola system was replaced by another APCO P25 system operating in the 406.1-420MHz band. Most transmissions in this system can still be decoded with modern trunking scanners. Again the new system used the same sites for the new repeaters as the old system with a few additional sites.

06/12: System first seen, sites 01, 02, 10; transmissions mostly un-encrypted
11/13: Site 14 first seen
01/17: Sites 21, 22, 23, 24, 25, 26, 27 first seen; no activity, no peers; sites are still being set up
07/17: Sites 21, 22, 23, 24, 25, 26, 27 active, no peers
12/17: Some frequencies overlap with the same site in Motorola system; not currently used in this system. (Eventually to transition to this system when Motorola System is phased out?)
02/19: All sites verified and active; some minor corrections and additions; system has completely replaced the old Motorola system that is now completely offline. Some of the frequencies have been moved over
02/19: New site 28 detected and active
03/19: Located new site 28 in Frenchman Flat
01/20: All sites verified; first saw new site 07 (Nellis AFB North); some frequencies added to sites 01 (Nellis AFB South) and 02 (Creech AFB)
08/20: All sites verified, minor changes in peers; site 24 appears to be down
01/23: All sites verified, no major changes; site 24 is up but has very little traffic
01/24: All sites verified; no changes

Talk Groups

4	Red Flag MOC General Announcements
7	MOC General Announcements
8	Fire/Rescue Dispatch Creech AFB
10	Fire Prevention Inspectors
12	Fire Department Training Net (Ops)
13	Fire Department Training (Nellis AFB)
24	Lodging
27	Building Maintenance
49	(encrypted)
50	Fire/Rescue Dispatch
51	Rescue Vehicles
52	Ambulance dispatch
53	Medical transport, Ambulance
55	Fire Dispatch Creech AFB
58	Fire Dispatch, Nellis AFB (some encrypted)
59	Gate Security Control (some encrypted)
60	Security (mostly encrypted)
61	Security (some encrypted)
62	(encrypted)
63	(encrypted)
64	(encrypted)
70	Nellis Security (mostly encrypted)
80	Nellis Police Dispatch (traffic, building security)
82	VA Hospital, shuttle
84	Building Maintenance
86	VA Hospital, Building Maintenance
101	VA Hospital, Security Dispatch
111	Warehouse Net
114	Call Boxes in parking areas etc.
207	Ground troops, field exercise
212	Aircraft Fuelers
214	Personnel Shuttle
217	Transportation (Cargo handling)
222	Nellis Police/surveillance operations (encrypted)
238	Radio Maintenance
298	Aircraft Maintenance Unit "Bolt" (422 TES)
299	Aircraft Maintenance Unit "Lightning" (F-35, 57th Aircraft Maintenance Squadron)
301	Nellis Tower
303	Maintenance Operations Center "MOC" Common
304	Aircraft Maintenance Unit "Viper" (F-16, 57th Aircraft Maintenance Squadron)
305	Aircraft Maintenance Unit "Tomahawk" (F-16C/D, 57th Aircraft Maintenance Squadron)
306	Aircraft Maintenance Unit "Phoenix" (757th Aircraft Maintenance Squadron)
307	Aircraft Maintenance Unit "Thunder" (A-10, 757th Aircraft Maintenance Squadron)
308	Aircraft Maintenance Unit "Strike" (F-15E, 757th Aircraft Maintenance Squadron)
309	Ramp Ops Common
310	Flight Line Supervisor
311	Ramp Ops Misc.
312	Flight Line Supervisor/EOR/Ammo control? ("Gatorade", "Red Bull")
313	Ammo Transport ("Stinger", "Gator", "Wizard", "Boomer", "Hydra")
314	Ammo Depot (Inventory checks)
315	Aircraft Maintenance Unit "Raptor" (F-22, 57th Aircraft Maintenance Squadron)
317	Red Flag, guest unit "Moonshine"
318	Red Flag Ramp Ops
319	Red Flag Ops / Maintenance / Exercises
320	Red Flag Ops
321	Red Flag MOC
322	Red Flag Ramp Ops Common
323	Red Flag MOC Ramp Ops
324	Red Flag Ramp Ops "Rocket"
325	Red Flag Flight Line Super
326	Red Flag Ramp Ops Misc
327	Red Flag, Belgian units ground crews
328	Red Flag, foreign units ground crews "Sahid"
329	Red Flag, foreign units ground crews
330	Red Flag EOR
335	Airfield Control
339	Aircraft Maintenance "Falcon"
340	Aircraft pod techs
347	Red Flag Ramp Ops Misc 2
416	Creech AFB MOC
423	Creech Tower
440	Radio Maintenance
2024	Nellis AFB Crash Recovery, Fire Command
30000	Main net for JSCP candidate training
30008	Clean-up Net
30033	Road safety/maintenance trucks (handle road hazards, cones, barricades etc.)
30034	Power grid technicians (Area 6 & 11, Tweezer Facility)
30035	Power grid technicians
30037	Electrical Maintenance
30038	Road construction crew, flaggers, Mercury area
30042	Building Maintenance
30045	Forklift operators
30046	Boom truck/crane operators
30050	Forklift/heavy equipment operators
30058	UAV Operations, Technicians
30059	UAV Operations, Crew Chief
30064	Weather Net
30069	ETS Base (Engine Test Stand)
30076	Radioactive "Shots" in Areas 6 & 11
30078	Area 5 cargo transportation
30079	Landscapers
30083	Waste Management
30085	JSCP candidate field training, Channel "300-1"
30086	JSCP candidate field training, Channel "300-2"
30087	JSCP candidate field training, Channel "300-3"
30088	JSCP training Ops
30096	JSCP candidate training, Camp Lead
30093	Field sensor monitoring crews in northern/central NNSS
30097	JSCP candidate training, Camp Lead, Instructors
30105	JSCP candidate training, Instructors
30111	Area 25 Security
30126	Nuke test training, equipment/diagnostic techs
30128	Fire & Rescue
30133	Outside contractors setting up targets in northern NNSS
31204	Emergency Interop Radio Patch (Nye County, NNSS Fire & Rescue)
31211	Security Central (some encrypted)
31212	Security, TAC-2
31213	Security, TAC-3
31218	LV DOE Facility, Building Security (mostly encrypted)
31219	LV DOE Facility, Building Security (mostly encrypted)
322xx	Secondary TG ID's generated with general announcement from Fire Dispatch, MOC, MUNS Control etc
32511	Desert Rock UAV Flight Ops "Cyborg"
32512	Area 25 Control (Cyborg), Ghost Ops, Vulture Ops (UAV)
32525	Radio Technicians
32537	US Army radar or tracking units "Burro" visiting from Fort Irwin
32538	US Army radar or tracking units "Burro" visiting from Fort Irwin
32601	BEEF
32606	Amateur Radio Techs
32607	Amateur Radio Techs (Testing radios and antennas in 10m HAM band, eastern NTTR)
33002	Radio Techs (Servicing and testing radios, equipment and remote repeaters)
34001	Technicians servicing water lines
35000	OCC Net, Bird Dog ("Operations and Command Center", General Announcements)
35002	Fire Station 1+2, Rescue Net
35003	Controller Net, Chief Controller to other controllers, coordinating exercise
35006	SOC Net (Security contractor)
35010	Fire Dispatch Emergency
36101	Fire & Rescue Station 2, Dispatch (Area 6, mostly encrypted)
36104	Fire & Rescue Station 2, Command 1 (Area 6, mostly encrypted)
36105	Fire & Rescue Station 2, Command 2 (Area 6, mostly encrypted)
36106	EM Interact Radio Patch
36126	Fire & Rescue Station 2, vehicles
38114	Station 2 Fire Alarm
38115	Fire Station 1 and 2 Dispatch

NTTR Trunking System (P25, UHF Air)

System: APCO P25 Phase 1
Band: UHF Mil. Air (385-389 MHz / 395-399 MHz)
WACN: 33744h / System ID: 001h
Modulation: C4FM
System Voice: APCO P25, all talkgroups encrypted
Band Plan: Base: 380.0625 MHz, Step: 12.5 kHz, Lo: 00-0000, Hi: 00-4095
TX Offset: +10.0 MHz

Site	Location	NAC	Frequencies	Peers
01	Tonopah, Radar Peak	00Bh	385.9125 386.3375 386.6500 387.2500 387.5500	02 03 04 08 10
02	Antelope Peak (TTR)	00Ch	385.8125 386.2500 386.5500 386.8500 387.3500 387.7250 388.7000	01 03 04 10
03	Cedar Peak	00Dh	385.7750 386.1875 386.4875 386.9125 387.2750 387.6625 388.1125	01 02 05 06 08 10
04	Halligan Mesa (Basecamp)	00Eh	385.6250 386.3750 386.7000 387.2125 387.5125	01 02 05
05	Bald Mountain	00Fh	385.7250 386.1250 386.5250 386.9375 387.3250	03 04 06
06	Papoose Mountain	010h	385.6750 385.9625 386.2750 386.5750 386.8875	03 05
07	Angel Peak	011h	385.6250 386.3750 386.7000 387.2125 387.5125	09 10
08	TTR	012h	385.8625 386.3000 386.6000 386.9750 387.4375	01 03 10
09	Creech AFB	013h	385.9125 386.3375 386.6500 387.2500 387.5500	07 10
10	Black Mountain	014h	385.0875 385.7000 386.0125 388.0000 388.5000	01 02 03 07 08 09

03/22/12: System first detected. No activity on system as of 12/28/2012.
Except for Systems 08 and 10 the location of the sites is the same as the old EDACS sites with the same Site ID.
05/29/13: System is active, replaced the old EDACS ProVoice system. Transmissions are encrypted.
12/17: All sites verified
02/19: All sites verified, no changes
01/20: All sites verified, only change is frequency 5 for Halligan Mesa is no longer in use
08/20: All sites verified, some changes in peers
05/22: All sites verified; no changes
01/23: All sites verified; no changes
01/24: All sites verified; no changes

System Map

This map shows the locations of the trunking repeater sites of both systems. Green marks are used for the NTTR system, blue marks for the NNSS, Nellis & Creech system. Click to enlarge.