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 These systems are either no longer in use or have been superceded by another system.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 |
|---|---|---|---|---|---|
| Adams County E-911 District | LTR | Passport | Adams County | Adams | 2019-08-07 |
| Advanced Wireless Network (Natchez) | LTR | Standard | Natchez | Adams | 2019-08-07 |
| Beau Rivage Casino and Hotel | Motorola | Type II Smartnet | Biloxi | Harrison | 2016-09-07 |
| Bryan Foods | Motorola | Type II | West Point | Clay | 2016-05-27 |
| Camp Shelby Joint Forces Training Center | Motorola | Type II SmartZone | Camp Shelby | Forrest | 2013-03-25 |
| Chevron Pascagoula Refinery | Motorola | Type II | Pascagoula | Jackson | 2021-07-05 |
| City of Madison | Motorola | Type II SmartZone | Madison | Madison | 2018-11-21 |
| City of Madison Public Safety *ASTRO* | Motorola | Type II | Madison | Madison | 2007-12-06 |
| Clarke County Public Safety | DMR | Motorola Capacity Plus Multi Site (TRBO) | Various | Clarke | 2018-06-07 |
| CNET Solutions | LTR | Standard | Robinsonville | Tunica | 2022-09-26 |
| Columbus Air Force Base | Motorola | Type II SmartZone | Columbus | Lowndes | 2016-03-28 |
| ComSouth | LTR | Standard | Various | Multi-County [11] | 2010-03-06 |
| ComSouth (Brandon) | LTR | Standard | Brandon | Rankin | 2018-02-21 |
| ComSouth (Columbia) | LTR | Standard | Columbia | Marion | 2018-02-21 |
| ComSouth (Hattiesburg) | LTR | Standard | Hattiesburg | Lamar | 2018-02-21 |
| ComSouth (Laurel) | LTR | Standard | Laurel | Jones | 2018-02-21 |
| ComSouth (Magee) | LTR | Standard | Magee | Simpson | 2004-11-17 |
| ComSouth (Magee) | LTR | Standard | Magee | Simpson | 2019-07-06 |
| ComSouth Meridian UHF | DMR | Motorola Connect Plus (TRBO) | Meridian | Multi-County [2] | 2018-05-25 |
| ComSouth Meridian VHF | DMR | Motorola Connect Plus (TRBO) | Meridian | Lauderdale | 2018-02-24 |
| ComSouth MotoTRBO (Magee) | DMR | Motorola Connect Plus (TRBO) | Magee | Simpson | 2018-02-21 |
| ComSouth VHF (Bogue Chitto) | LTR | Standard | Bogue Chitto | Lincoln | 2018-09-07 |
| DeSoto County Public Safety | Motorola | Type II SmartZone | DeSoto County | DeSoto | 2018-07-13 |
| Entergy (Motorola) | Motorola | Type II SmartZone Omnilink | Statewide | Multi-County [66] | 2018-06-21 |
| Ergon Refining | LTR | Standard | Vicksburg | Warren | 2023-03-06 |
| Forrest County Public Safety | Motorola | Type II SmartZone | Hattiesburg, 2 Others | Multi-County [2] | 2014-05-23 |
| Hancock County Public Safety | Project 25 | Phase I | Kiln | Hancock | 2016-09-11 |
| Hancock County Public Safety *ASTRO* | Motorola | Type II Smartnet | Waveland | Hancock | 2007-01-25 |
| Hard Rock Hotel and Casino | LTR | Standard | Biloxi | Harrison | 2018-07-20 |
| Hinds County | Motorola | Type II SmartZone | Jackson | Hinds | 2018-05-25 |
| Imperial Palace Hotel and Casino | LTR | Standard | Biloxi | Harrison | 2018-06-05 |
| Island View Casino Resort | LTR | Standard | Gulfport | Harrison | 2018-06-05 |
| Jackson Communications | LTR | Standard | Jackson | Hinds | 2022-04-06 |
| Jackson Communications (450 MHz) | DMR | Motorola Capacity Plus Single Site (TRBO) | Jackson | Hinds | 2022-04-06 |
| Jackson Public Works | EDACS | Standard | Jackson | Hinds | 2014-08-19 |
| Jackson-Evers International Airport | EDACS | Standard | Jackson | Rankin | 2021-07-05 |
| Jones County | Motorola | Type II SmartZone | Jones County | Jones | 2016-12-18 |
| Leading Edge Communications | LTR | Standard | Various | Multi-County [8] | 2008-04-21 |
| Lee County MS Public Safety | Motorola | Type II SmartZone | Tupelo | Lee | 2014-08-02 |
| Magnolia Electric Power Association | DMR | Motorola Capacity Plus Multi Site (TRBO) | Various | Multi-County [2] | 2019-12-05 |
| Mississippi Department of Corrections | EDACS | Standard | Various | Multi-County [3] | 2022-03-28 |
| Naval Air Station Meridian | Motorola | Type II | Meridian | Lauderdale | 2012-09-09 |
| Nextel (Jackson) | EDACS | Standard | Jackson | Hinds | 2018-03-03 |
| Nextel (Ocean Springs) | Motorola | Type II | Ocean Springs | Jackson | 2011-12-02 |
| Nissan Manufacturing Canton Plant | Motorola | Type II Smartnet | Canton | Madison | 2021-05-11 |
| Noxubee County | EDACS | Standard | Macon | Noxubee | 2021-02-11 |
| Oktibbeha County Public Safety | EDACS | Networked Standard | Starkville | Oktibbeha | 2014-08-13 |
| Ozborn Communications (LTR) | LTR | Standard | Canton | Madison | 2022-04-06 |
| Pearl River Valley Electric Power Association | DMR | Motorola Connect Plus (TRBO) | Various | Multi-County [4] | 2018-06-12 |
| Rankin County | Motorola | Type II Smartnet | Rankin County | Rankin | 2016-06-11 |
| Ridgeland Public Safety | Motorola | Type II Smartnet | Ridgeland | Madison | 2007-12-06 |
| Simpson County MS Public Safety | LTR | Standard | Magee/Mendenhall/Harrisvi | Simpson | 2018-04-23 |
| Southern Company LINC 800 MHz (Mississippi) | iDEN | Standard | Various | Statewide | 2016-06-09 |
| Southern Linc | iDEN | Standard | Eastabutchie | Jones | 2016-06-09 |
| Telecomm Network (Gulfport) | LTR | Standard | Gulfport | Harrison | 2018-06-06 |
| Tower Communications (Natchez) | LTR | Standard | Natchez | Adams | 2018-08-16 |
| Warren County / Vicksburg Public Safety | Motorola | Type II SmartZone | Vicksburg | Warren | 2017-05-25 |
| Warren County Public Safety | Motorola | Type II SmartZone | Vicksburg | Warren | 2008-04-30 |
| Washington County MS | Motorola | Type II Smartnet | Greenville | Washington | 2017-12-25 |
| Whirlpool - Oxford | LTR | Standard | Oxford | Lafayette | 2015-01-26 |
| Yazoo County E-911 District | LTR | Standard | Yazoo City | Yazoo | 2020-12-08 |