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 These systems are either no longer in use or have been superceded by another system.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 |
|---|---|---|---|---|---|
| Advanced Wireless Telecommunications (Ann Arbor) | LTR | Passport | Ann Arbor | Washtenaw | 2008-03-06 |
| Advanced Wireless Telecommunications (Detroit) | LTR | Passport | Detroit | Wayne | 2008-03-06 |
| All Call Wireless, Inc. | LTR | Standard | Clarkston | Oakland | 2007-01-19 |
| Allegan County Public Safety | EDACS | Standard | Allegan | Allegan | 2018-05-29 |
| Allen Electronics, Inc. (DBA: GMRS) | LTR | Standard | Southfield | Oakland | 2011-06-03 |
| Alpena County Regional Airport (APN) | iDEN | Standard | Alpena | Alpena | 2010-08-22 |
| American Axle Manufacturing (Detroit) | LTR | Standard | Metro Detroit Area | Multi-County [2] | 2011-10-19 |
| American Electric Power (OpenSky) System | OpenSky | 9600 baud | Varies | Multi-County [15] | 2021-08-06 |
| Americom Wireless | DMR | Motorola Capacity Plus Single Site (TRBO) | Metro Area | Multi-County [4] | 2016-03-08 |
| Bay City Governmental Services | LTR | Standard | Bay City | Bay | 2021-09-16 |
| Bay City Public Schools | LTR | Standard | Bay City | Bay | 2022-06-15 |
| Bearcom: Michigan International Speedway | DMR | Motorola Capacity Plus Single Site (TRBO) | Brooklyn | Lenawee | 2022-01-13 |
| Bishop Communications | Motorola | Type II Smartnet | Grandville | Kent | 2016-05-21 |
| Bradford White Corporation | LTR | Standard | Middleville | Barry | 2023-11-01 |
| C and C Communications: NEXEDGE | NXDN | NEXEDGE 4800 | Varies | Multi-County [2] | 2018-07-13 |
| Capital Area Transportation Authority | LTR | Standard | Lansing | Ingham | 2018-09-24 |
| Capital Area Transportation Authority (CATA) | LTR | Standard | Lansing | Ingham | 2005-01-20 |
| Capital Area Transportation Authority - ComSource | DMR | Motorola Capacity Plus Single Site (TRBO) | Lansing | Ingham | 2025-02-02 |
| Chippewa County International Airport (CIU) | iDEN | Standard | Kinross | Chippewa | 2011-05-17 |
| Chrysler Corporation (Warren) | Motorola | Type I | Warren | Macomb | 2012-04-20 |
| City of Jackson Act 196 Transportation Authority | LTR | Standard | Jackson | Jackson | 2021-12-19 |
| CLEMIS (OakWIN) Public Safety Communications | OpenSky | 9600 baud | Oakland County | Multi-County [2] | 2024-04-13 |
| Clinton County Public Safety | EDACS | Standard | Clinton County | Clinton | 2022-03-27 |
| Coca Cola Company (Paw Paw) | DMR | Motorola Capacity Plus Single Site (TRBO) | Paw Paw | Van Buren | 2022-01-12 |
| Communications Specialists | NXDN | NEXEDGE 9600 | Grand Rapids | Kent | 2016-09-04 |
| ComSource - MOTOTRBO UHF (Metro Detroit) | DMR | Motorola Capacity Plus Single Site (TRBO) | Detroit | Multi-County [4] | 2012-05-05 |
| Comsource: Davison | DMR | Motorola Capacity Plus Single Site (TRBO) | Davison | Genesee | 2012-05-05 |
| Comsource: Lansing | DMR | Motorola Capacity Plus Single Site (TRBO) | Lansing | Ingham | 2011-09-21 |
| Consumers Energy | EDACS | Networked Standard | Various | Multi-County [66] | 2022-09-29 |
| Covenant Health Care | DMR | Conventional Networked | Saginaw - Bay City | Multi-County [2] | 2025-02-01 |
| Covenant Healthcare | DMR | Motorola Connect Plus (TRBO) | Saginaw | Saginaw | 2019-03-17 |
| Delta Airlines - Detroit Metropolitan Airport (DTW) | Motorola | Type II Smartnet | Detroit | Wayne | 2016-09-04 |
| Delta College (Bay) | LTR | Standard | University Center | Bay | 2019-02-25 |
| DeltaCom | MPT-1327 | Standard | Port Huron | St. Clair | 2016-03-16 |
| DeltaCom - UHF (MetroDetroit) | LTR | Standard | Southfield | Multi-County [3] | 2018-08-24 |
| Detroit City Services | Motorola | Type I | Detroit | Wayne | 2005-11-28 |
| Detroit International Bridge Company | LTR | Standard | Detroit | Wayne | 2024-10-07 |
| Detroit Lions / Ford Field | LTR | Standard | Detroit | Wayne | 2022-12-13 |
| Detroit Newspaper Agency | LTR | Standard | Detroit | Multi-County [2] | 2024-07-19 |
| Detroit Public Safety | DMR | Motorola Connect Plus (TRBO) | Detroit | Wayne | 2018-08-16 |
| Detroit Public Safety (Future) | Motorola | Type II SmartZone | Detroit | Wayne | 2005-10-06 |
| Dow Corning Corporation | LTR | Standard and Passport | Midland | Midland | 2019-01-11 |
| DowDuPont Plants | Motorola | Type II Smartnet | Midland | Midland | 2019-01-02 |
| Downriver Mutual Aid Public Safety System | Motorola | Type II SmartZone | SE Wayne County | Wayne | 2013-11-10 |
| DTE Energy - Fermi 2 Nuclear Power Plant | LTR | Standard | Newport | Monroe | 2021-08-21 |
| East Lansing Public Works | DMR | Motorola Capacity Plus Single Site (TRBO) | East Lansing | Ingham | 2022-09-04 |
| Edward C Levy Company | Motorola | Type II SmartZone | Various | Multi-County [4] | 2007-08-09 |
| El Com Services, Inc. | LTR | Standard | Marquette | Marquette | 2017-03-01 |
| Electronic Communications (Detroit) | LTR | Standard | Franklin | Multi-County [2] | 2016-03-08 |
| Escanaba/Delta County Airport (ESC) | iDEN | Standard | Escanaba | Multi-County [2] | 2011-05-17 |
| FCA US: Sterling Heights | Motorola | Type II Smartnet | Sterling Heights | Macomb | 2015-06-11 |
| Fiorini | LTR | Standard and Passport | Detroit | Multi-County [2] | 2007-12-31 |
| Ford Communications - Wayne Assembly Plant (EDACS) | EDACS | Narrowband | Wayne | Wayne | 2010-10-10 |
| Ford Motor Company: Flat Rock Assembly Plant | LTR | Standard | Flat Rock | Wayne | 2021-10-29 |
| Forest Hills Public Schools | EDACS | Standard | Grand Rapids | Kent | 2023-01-09 |
| Futronics (MOTOTRBO) | DMR | Motorola Connect Plus (TRBO) | Varies | Multi-County [9] | 2016-10-03 |
| Futronics (UHF) | DMR | Motorola Capacity Plus Single Site (TRBO) | Various | Multi-County [21] | 2016-09-09 |
| General Mobile Radio Service | DMR | Motorola Capacity Plus Single Site (TRBO) | Roseville | Multi-County [4] | 2016-03-08 |
| General Motors (Pontiac) | Motorola | Type IIi Hybrid | Pontiac | Oakland | 2009-09-08 |
| General Motors Corporation: Willow Run Powertrain | EDACS | Narrowband | Ypsilanti | Washtenaw | 2010-10-03 |
| General Motors Poletown Cadillac Assembly Plant | Motorola | Type I | Hamtramck | Wayne | 2016-03-09 |
| General Motors Research | Motorola | Type II | Various | Multi-County [6] | 2016-05-18 |
| General Motors Research | DMR | Motorola Capacity Plus Single Site (TRBO) | Lake Orion | Oakland | 2015-12-16 |
| General Motors Research Corp (Lansing) [Depreciated] | Motorola | Type II Smartnet | Lansing | Ingham | 2008-10-28 |
| Genesee County 9-1-1 Consortium | Project 25 | Phase I | Flint | Genesee | 2004-11-03 |
| Greenville Public Schools | LTR | Standard | Greenville | Kent | 2006-02-09 |
| Greenville Public Schools | LTR | Standard | Greenville | Montcalm | 2018-03-14 |
| Grosse Pointe Intermunicipal Radio System | Motorola | Type II Smartnet | Grosse Pointe Farms | Wayne | 2012-09-18 |
| Hall Associates, Inc. | LTR | Standard | Pontiac | Oakland | 2007-01-19 |
| Holcim (Dundee) | LTR | Standard | Dundee | Monroe | 2019-02-07 |
| Houghton County Memorial Airport | iDEN | Standard | Calumet | Houghton | 2009-03-28 |
| Huron County Public Safety | LTR | MultiNet | Bad Axe | Huron | 2014-07-04 |
| I I Stanley (Battle Creek) | LTR | Standard | Battle Creek | Calhoun | 2016-03-14 |
| Ingham County Public Safety | EDACS | Standard | Lansing | Multi-County [2] | 2022-01-13 |
| Ironwood Airport | iDEN | Standard | Ironwood | Gogebic | 2013-10-27 |
| Kalamazoo Public Safety | Motorola | Type II Smartnet | Kalamazoo | Kalamazoo | 2006-11-16 |
| Kay Communications (Saginaw) | LTR | Standard and Passport | Saginaw | Multi-County [2] | 2024-04-08 |
| Lansing City Services | Motorola | Type II | Lansing | Ingham | 2021-08-27 |
| Lapeer County Public Safety | Motorola | Type II Smartnet | Lapeer County | Lapeer | 2013-02-24 |
| Lenawee County Road Commission | LTR | Passport | Adrian | Lenawee | 2024-01-14 |
| Livonia Public Safety | EDACS | Standard | Livonia | Wayne | 2012-03-29 |
| Louchart Enterprises (800 MHz) | Motorola | Type II SmartZone | Bay City | Multi-County [6] | 2022-05-27 |
| Manistee County-Blacker Airport (MBL) | iDEN | Standard | Manistee | Manistee | 2016-05-17 |
| Mariott Renaissance Center - RenCen (Detroit) | LTR | Standard | Detroit | Wayne | 2015-03-03 |
| MASS Transportation Authority | Motorola | Type II Smartnet | Flint | Genesee | 2014-05-30 |
| Michigan Dept. of Transportation | EDACS | Standard | Detroit | Wayne | 2006-02-09 |
| Michigan State University | Motorola | Type II Smartnet | E Lansing | Ingham | 2021-09-04 |
| Michigan State University (900 MHz) | Motorola | Type II Smartnet | East Lansing | Ingham | 2010-07-27 |
| Midland City | LTR | Standard | Midland | Midland | 2017-02-21 |
| Midland County Government | LTR | Standard | Midland | Midland | 2020-05-06 |
| Mobile Communications Sales (420 MHz) | LTR | Passport | Warren | Oakland | 2019-02-01 |
| Mobile Communications Sales (900 MHz) | LTR | Passport | Warren | Multi-County [2] | 2016-03-21 |
| Nextel (Constantine) | Motorola | Type II Smartnet | Constantine | St. Joseph | 2020-01-24 |
| Nextel (Detroit-1) | Motorola | Type II Smartnet | Detroit | Wayne | 2004-09-03 |
| Nextel (Detroit-2) | Motorola | Type II Smartnet | Detroit Metro Area | Wayne | 2004-09-03 |
| Nextel (Oak Park) | Motorola | Type II Smartnet | Oak Park | Oakland | 2016-03-08 |
| Nextel (Romulus) | Motorola | Type II Smartnet | Romulus | Wayne | 2004-09-03 |
| Northville Public Schools | LTR | Standard | Northville | Wayne | 2017-12-08 |
| Northville Public Schools (DMR) | DMR | Motorola Capacity Plus Single Site (TRBO) | Northville | Wayne | 2017-12-08 |
| Oakland County - System 1 | Motorola | Type II Smartnet | Pontiac | Oakland | 2010-07-24 |
| Palace Sports and Entertainment Complex (DTE Energy Music Theater) | DMR | Motorola Capacity Plus Single Site (TRBO) | Auburn Hills | Oakland | 2022-01-08 |
| Pfizer (900 MHz) | LTR | Standard | Ann Arbor | Washtenaw | 2008-02-01 |
| Pfizer, Inc. | LTR | Standard | Ann Arbor | Washtenaw | 2010-06-29 |
| Pharmacia and Upjohn (Pfizer) | Motorola | Type II Smartnet | Kalamazoo | Kalamazoo | 2018-07-20 |
| Presque Isle Electric and Gas Co-Op | MPT-1327 | Standard | Onaway | Multi-County [7] | 2019-04-15 |
| RCI Communications | DMR | Motorola Connect Plus (TRBO) | Jackson | Jackson | 2020-01-24 |
| Repeater Systems (MOTOTRBO) | DMR | Motorola Connect Plus (TRBO) | Various | Multi-County [4] | 2016-07-25 |
| Roamer One (Kalamazoo) | MPT-1327 | Standard | Kalamazoo | Multi-County [2] | 2016-05-23 |
| Saginaw City Public Works | LTR | Standard | Saginaw | Saginaw | 2013-06-20 |
| Saginaw County | Motorola | Type II Smartnet | Saginaw | Saginaw | 2009-12-21 |
| Sawyer International Airport (SAW) | iDEN | Standard | Marquette | Marquette | 2017-03-01 |
| SMR Communications (Webster Hills) | LTR | Standard | Webster Hills | St. Joseph | 2016-04-22 |
| Snapper Communications | LTR | Passport | Allegan | Allegan | 2017-02-24 |
| Southwest Airlines: Bishop International Airport | DMR | Motorola Capacity Plus Single Site (TRBO) | Flint | Genesee | 2018-06-07 |
| State of Michigan Public Safety (Upper Peninsula) | Project 25 | Phase I | Various | Multi-County [15] | 2004-10-15 |
| State Systems Radio | Motorola | Type II Smartnet | Portage | Kalamazoo | 2022-10-05 |
| Station Casino (Bradley) | Motorola | Type II | Bradley | Allegan | 2015-02-09 |
| Steelcase | Motorola | Type II Smartnet | Grand Rapids | Kent | 2016-05-21 |
| T and W Electronics (DMR) | DMR | Motorola Connect Plus (TRBO) | Allegan | Allegan | 2018-07-20 |
| Target Distribution Center (Galesburg) | LTR | Standard | Galesburg | Kalamazoo | 2024-10-23 |
| Tecumseh Public Schools | NXDN | NEXEDGE 9600 | Tecumseh | Lenawee | 2014-08-25 |
| Transdev Transportation Services | DMR | Motorola Capacity Plus Single Site (TRBO) | Lansing | Ingham | 2025-02-02 |
| Troup Electronics | DMR | Motorola Connect Plus (TRBO) | Jackson | Jackson | 2015-11-27 |
| TRT Partners (Capacity Plus) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Grand Rapids | Kent | 2020-01-13 |
| Tuscola County Public Safety | LTR | MultiNet | Caro | Tuscola | 2011-10-14 |
| unidentified LTR - UHF (Mackinaw City [Depreciated] | LTR | Standard | Mackinaw City | Cheboygan | 2009-06-28 |
| University of Michigan | Motorola | Type II Smartnet | Ann Arbor | Washtenaw | 2021-08-26 |
| University of Michigan Stadium | LTR | Standard | Ann Arbor | Washtenaw | 2015-01-15 |
| University of Michigan: North Campus Research Complex | LTR | Standard | Ann Arbor | Washtenaw | 2017-02-14 |
| Unknown DMR | DMR | Motorola Connect Plus (TRBO) | Grand Rapids | Kent | 2020-01-03 |
| Walker City Public Safety | SmarTrunk | Standard | Walker | Kent | 2021-07-02 |
| Warren Public Safety (Fallback) | Motorola | Type II Smartnet | Warren | Macomb | 2018-04-05 |
| Wayne County Airport Authority | Motorola | Type II Smartnet | Romulus | Wayne | 2013-12-16 |
| Wayne County Government | Motorola | Type II Smartnet | Detroit | Wayne | 2012-01-10 |
| Wayne County System 1 Countywide (old) | Motorola | Type IIi Hybrid | Wayne County | Wayne | 2007-08-08 |
| Wayne State University | SmarTrunk | Standard | Detroit | Wayne | 2016-09-27 |
| Western Michigan University | Motorola | Type II SmartZone | Kalamazoo | Kalamazoo | 2016-09-04 |
| Western Wayne Mutual Aid Radio System | Motorola | Type II SmartZone | Westland | Wayne | 2014-02-07 |
| William Beaumont Hospital - Troy | NXDN | NEXEDGE 9600 | Troy | Oakland | 2010-05-03 |
| Wolverine Power Supply Cooperative | MPT-1327 | Standard | Cadillac | Multi-County [12] | 2019-04-15 |
| Ypsilanti Public Safety | EDACS | Standard | Ypsilanti | Washtenaw | 2005-04-11 |