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Four Square Mile Police Frequencies

We do not have frequencies listed specifically for Four Square Mile in Arapahoe County, Colorado yet. Countywide channels for Arapahoe County that may also cover this area are shown below when we have them. The closest trunked radio site we have is DTB Test (State of Colorado DTRS), about 3 miles away.

About Four Square Mile Police Frequencies

  • 1 conventional channel is analog FM, so any scanner can receive it. Enter the frequency and set the tone shown in the table.
  • Trunked radio systems that carry law-enforcement traffic here: State of Colorado DTRS: 20 talkgroups. A trunking scanner is required, and it must support the system type shown.
  • To follow a trunked system, program a control channel first. For Four Square Mile, start with the DTB Test site of State of Colorado DTRS, about 3 miles away. Its control channels: 852.7625 MHz.
  • 20 listed entries are marked encrypted. No scanner can decode encrypted audio.

Arapahoe County channels that also cover Four Square Mile

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Arapahoe County SheriffArapahoe/Adams Sheriff Car/Car460.1750
In 465.1750
FMNWNJM750

State of Colorado DTRS

20 encrypted talkgroups (cannot be monitored)
AgencyDescriptionTalkgroupHexMode
Arapahoe County SheriffSheriff 1 – Dispatch3001bb9D
Arapahoe County SheriffSheriff 2 – Records3002bbaD
Arapahoe County SheriffSheriff 3 – Special Operations3003bbbD
Arapahoe County SheriffSheriff 4 – Special Operations3004bbcD
Arapahoe County SheriffSheriff 5 – Car/Car3005bbdD
Arapahoe County SheriffSheriff 6 – Car/Car3007bbfD
Arapahoe County SheriffSheriff Investigations3009bc1D
Arapahoe County SheriffSheriff Investigations3010bc2D
Arapahoe County SheriffSheriff Patrol Impact Team Operations3080c08D
Arapahoe County SheriffSheriff Patrol Impact Team3081c09D
Arapahoe County SheriffSheriff Civil Process3084c0cD
Arapahoe County SheriffSheriff Warrants/Fugitives3085c0dD
Arapahoe County SheriffSheriff Investigations3086c0eD
Arapahoe County SheriffSheriff SWAT3087c0fD
Arapahoe County SheriffSheriff Supervisors3013bc5D
Arapahoe County SheriffSheriff Command3014bc6D
Arapahoe County SheriffSheriff Training3082c0aD
Arapahoe County SheriffSheriff Training3083c0bD
Arapahoe County SheriffSheriff Detentions3011bc3D
Arapahoe County SheriffSheriff Detentions3012bc4D

Nearest trunked radio sites

Distances are measured from the center of Four Square Mile.

DTB Test · State of Colorado DTRS
RFSS 1 · Site 67 (hex 43) · NAC D13 · about 3 mi away
Control 852.7625
Voice 851.325
Denver Tx Building (DTB) · State of Colorado DTRS
RFSS 1 · Site 20 (hex 14) · NAC D14 · about 3 mi away
Control 852.5625, 852.8125, 853.7
Voice 770.28125, 772.55625, 773.90625, 774.30625, 774.55625, 774.80625, 851.4375, 852.3625, 852.9625, 853.7375
Denver Simulcast · Denver
RFSS 1 · Site 1 (hex 1) · NAC 9C1 · about 4 mi away
Control 856.1375, 859.2125, 859.6125, 859.7125
Voice 854.0625, 854.5625, 855.4625, 855.7375, 856.2375, 856.6375, 856.7125, 857.0625, 857.4625, 857.7375, 858.1375, 858.2125, 858.7375
What do these numbers mean?
Control channel
The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
Voice
The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
Site
One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
RFSS (Radio Frequency Sub-System)
A group of sites run by the same controller. Large Project 25 systems can have several.
NAC (Network Access Code)
A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
Talkgroup
A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.