About Chapin Police Frequencies
- 3 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.
- To follow a trunked system, program a control channel first. For Chapin, start with the Latimer site of Iowa Statewide Interoperable Communications System (ISICS), about 7 miles away. Its control channels: 769.95625, 770.20625, 770.45625 MHz.
- 2 listed entries are marked encrypted. No scanner can decode encrypted audio.
Franklin County channels that also cover Chapin
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Franklin County Sheriff | Sheriff/EMS Dispatch | 154.8150 In 159.0300 | 127.3 PL | FM | WNYJ539 |
Talk-around & Car-to-Car
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Franklin County Sheriff | Sheriff Information – Base | 155.2500 | FM | KAD448 | |
| Franklin County Sheriff | Sheriff Information – Mobile | 155.9100 | FM | KAD448 |
Iowa Statewide Interoperable Communications System (ISICS)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Franklin County Sheriff | LAW 1 | 30001 | 7531 | T |
| Franklin County Sheriff | Franklin County Sheriff – Dispatch | 30002 | 7532 | T |
| Franklin County Sheriff | Law Roam | 30015 | 753f | T |
| Franklin County Sheriff | Law Tactical | 30004 | 7534 | T |
| Franklin County Sheriff | Law Tactical | 30005 | 7535 | T |
2 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Franklin County Sheriff | Law Tactical 5E | 30007 | 7537 | T Encrypted |
| Franklin County Sheriff | Law Tactical 6E | 30008 | 7538 | T Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Chapin.
Latimer · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 1 · Site 33 (hex 21) · NAC 4C3 · about 7 mi away
Control 769.95625, 770.20625, 770.45625
Voice 769.20625, 769.45625, 769.70625
Mason City · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 1 · Site 65 (hex 41) · NAC 4C4 · about 19 mi away
Control 769.90625, 770.15625, 770.40625
Voice 769.65625
Belmond · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 2 · Site 100 (hex 64) · NAC 4C1 · about 21 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 Chapin?
We do not have a dispatch channel listed specifically for Chapin. County-level dispatch channels in the same county: Franklin County Sheriff 154.8150 MHz (127.3 PL).