About Iowa Police Frequencies
We don't have any verified police frequencies for Iowa yet, but we're working on adding some.
If you know of any, or spot something wrong on a nearby page, please send it to contact@police-frequencies.com and we'll check it against the official records.
Nearest trunked radio sites
Distances are measured from the center of Iowa.
Mylo · North Dakota Statewide Interoperable Radio Network (SIRN 20/20)
RFSS 1 · Site 31 (hex 1F) · about 30 mi away
Control 852.0625, 852.2875
Voice 851.7875
Belcourt · North Dakota Statewide Interoperable Radio Network (SIRN 20/20)
RFSS 1 · Site 90 (hex 5A) · NAC A69 · about 37 mi away
Control 852.1125, 852.3375
Voice 851.8375
Towner · North Dakota Statewide Interoperable Radio Network (SIRN 20/20)
RFSS 1 · Site 89 (hex 59) · about 38 mi away
Control 853.7875
Voice 853.3375, 853.5625
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.