About Duncan Police Frequencies
- 2 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- Trunked radio systems that carry law-enforcement traffic here: Iowa Statewide Interoperable Communications System (ISICS): 7 talkgroups. A trunking scanner is required, and it must support the system type shown.
- 2 listed entries are marked encrypted. No scanner can decode encrypted audio.
Hancock County channels that also cover Duncan
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Hancock County Sheriff | Hancock County Sheriff – Dispatch – Britt Tower | 153.8150 | 146.2 PL | FMN | KAD505 |
| Hancock County Sheriff | Hancock County Sheriff – Dispatch – Garner Tower | 159.3225 | 146.2 PL | FMN | KAD505 |
Iowa Statewide Interoperable Communications System (ISICS)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Hancock County Sheriff | Law 1 | 31301 | 7a45 | T |
| Hancock County Sheriff | Law Tactical | 31303 | 7a47 | T |
| Hancock County Sheriff | Law Tactical | 31304 | 7a48 | T |
| Hancock County Sheriff | Law Tactical | 31305 | 7a49 | T |
| Hancock County Sheriff | Law Info | 31302 | 7a46 | T |
2 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Hancock County Sheriff | Law Tactical 6E | 31306 | 7a4a | T Encrypted |
| Hancock County Sheriff | Law Tactical 7E | 31307 | 7a4b | T Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Duncan.
Garner · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 2 · Site 41 (hex 29) · about 0 mi away
Voice 772.06875, 772.38125, 772.70625, 774.69375
Leland · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 1 · Site 92 (hex 5C) · NAC 4C2 · about 18 mi away
Control 773.78125, 774.03125, 774.28125
Voice 773.03125, 773.53125
Belmond · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 2 · Site 100 (hex 64) · NAC 4C1 · about 22 mi away
Control 770.68125, 774.55625, 774.80625
Voice 770.93125
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.
Common questions
What frequency do the police use in Duncan?
We do not have a dispatch channel listed specifically for Duncan. County-level dispatch channels in the same county: Hancock County Sheriff 153.8150 MHz (146.2 PL); Hancock County Sheriff 159.3225 MHz (146.2 PL).