Note: This is a listing of deprecated systems. These systems are either no longer in use or have been superceded by another system.
| System Name | Type | Flavor | City | County | Updated |
|---|---|---|---|---|---|
| A Communications | Motorola | Type II | Cedar Rapids | Linn | 2008-01-23 |
| Alliant Energy (iDEN) | iDEN | Standard | Various | Multi-County [106] | 2017-08-11 |
| AmerenMissouri (EDACS) | EDACS | Networked Standard | Various | Multi-County [59] | 2018-06-06 |
| Arconic | LTR | Standard | Bettendorf | Scott | 2020-09-15 |
| Black Hawk County E9-1-1 | Project 25 | Phase I | Waterloo | Black Hawk | 2008-08-26 |
| CEC - Communications Engineering Co | LTR | Standard | Davenport | Scott | 2020-09-15 |
| Cedar Rapids | Motorola | Type II SmartZone | Cedar Rapids | Linn | 2017-02-01 |
| Central Iowa Regional Public Safety Communications System (CIRPSCS) | Project 25 | Phase II | Various | Multi-County [5] | 2018-03-20 |
| Comelec (Motorola) | Motorola | Type IIi Hybrid | Davenport | Scott | 2020-02-16 |
| Council Bluffs-Pottawattamie County Public Safety | Project 25 | Phase I | Council Bluffs | Pottawattamie | 2006-02-01 |
| General Mills, Inc. | Motorola | Type II | Cedar Rapids | Linn | 2014-02-04 |
| Harrah's Council Bluffs / Horseshoe Casino | Motorola | Type II | Council Bluffs | Pottawattamie | 2021-10-19 |
| Interstate Power and Light Company (Cedar Rapids) | Motorola | Type II | Cedar Rapids | Linn | 2017-10-09 |
| Interstate Power and Light Company (DMR 1) | DMR | Tier 3 Standard | Various | Des Moines | 2017-03-16 |
| Interstate Power and Light Company (Marshalltown) | Motorola | Type II | Marshalltown | Marshall | 2017-12-04 |
| Iowa Medical and Classification Center | LTR | Standard | Oakdale | Johnson | 2018-07-20 |
| Iowa State Fairgrounds | Motorola | Type II | Des Moines | Polk | 2013-03-26 |
| Iowa State University | Motorola | Type II Smartnet | Ames | Story | 2006-04-12 |
| Isle of Capri Casino - Waterloo | LTR | Standard | Waterloo | Black Hawk | 2016-05-31 |
| John Deere - System 112 | DMR | Motorola Connect Plus (TRBO) | Various | Multi-County [2] | 2021-09-14 |
| Linn County | LTR | Standard | Cedar Rapids | Linn | 2017-02-25 |
| Linn County Public Safety (Project 25) System | Project 25 | Phase I | Various | Linn | 2014-06-13 |
| Midwest Mobile Radio Service (NW MO) | LTR | Passport | Rockport | Multi-County [19] | 2018-07-30 |
| Newton Correctional Facility | DMR | Tier 3 Standard | Newton | Jasper | 2018-09-10 |
| Pioneer International | LTR | Standard | Johnston | Polk | 2004-08-29 |
| RACOM Network | EDACS | Networked Standard | Various | Multi-County [41] | 2022-10-31 |
| Radio Communications | LTR | Standard | Cedar Rapids | Linn | 2021-11-19 |
| River City Communications (450 MHz) | LTR | Standard | Davenport | Scott | 2006-08-24 |
| Siouxland Tri-State Area Radio Communications (STARCOMM) | Project 25 | Phase I | Sioux City | Multi-County [3] | 2017-07-24 |
| The Conley Group | Motorola | Type II | Des Moines | Polk | 2019-03-11 |
| University of Northern Iowa | LTR | Standard | Cedar Falls | Black Hawk | 2019-05-25 |