| Cleveland Police and Metro Housing Authority | Cuyahoga | Public Safety | 331 |
| Toledo Police Central Dispatch | Lucas | Public Safety | 178 |
| Marion County Public Safety | Marion | Public Safety | 123 |
| Allen County Public Safety | Allen | Public Safety | 106 |
| Columbus Police Dispatch - Citywide | Delaware | Public Safety | 105 |
| Richland County Public Safety | Richland | Public Safety | 88 |
| Lake County Police & Fire | Lake | Public Safety | 83 |
| Hamilton County Police, Fire and EMS Dispatch | Hamilton | Public Safety | 73 |
| Muskingum County Sheriff, Fire and EMS - MARCS | Muskingum | Public Safety | 70 |
| Lorain County Police, Fire and EMS | Lorain | Public Safety | 69 |
| Belmont Fire EMS, Marshall, Ohio County WV Fire EMS PD, WVSP Trp 1 Cmd | Belmont | Public Safety | 66 |
| Jefferson County Public Safety Divisions 1, 2, and 3 | Jefferson | Public Safety | 65 |
| Defiance County Sheriff, City Police, Fire and EMS - Digital | Defiance | Public Safety | 61 |
| Darke County Public Safety | Darke | Public Safety | 61 |
| Licking County Public Safety | Licking | Public Safety | 60 |
| Sandusky County Sheriff, Fire / EMS, Fremont and Clyde Police / Fire | Sandusky | Public Safety | 56 |
| Clermont County Public Safety | Clermont | Public Safety | 53 |
| Ross County Public Safety | Ross | Public Safety | 48 |
| Geauga County Public Safety | Geauga | Public Safety | 45 |
| Central and Eastern Greene County Public Safety | Greene | Public Safety | 38 |
| Lucas County Fire/EMS | Lucas | Public Safety | 37 |
| Toledo Police South Dispatch | Lucas | Public Safety | 37 |
| Guernsey County Fire and EMS | Guernsey | Public Safety | 34 |
| Union County Public Safety | Union | Public Safety | 34 |
| Preble County Sheriff and Fire, Eaton Police | Preble | Public Safety | 33 |
| Sidney Police and Fire Dispatch | Shelby | Public Safety | 32 |
| Parma / Parma Heights Police and Fire | Cuyahoga | Public Safety | 32 |
| Putnam County Sheriff, Fire, EMS and PW | Putnam | Public Safety | 31 |
| Stark County Fire | Stark | Public Safety | 29 |
| Seneca County Fire and EMS Dispatch | Seneca | Public Safety | 28 |
| Van Wert County Public Safety | Van Wert | Public Safety | 28 |
| Portage County Fire, EMS and Police | Portage | Public Safety | 27 |
| Cuyahoga Falls Police & Fire | Summit | Public Safety | 26 |
| Wayne County Sheriff and Fire, Wooster, Rittman, Doylestown Police, Rittamn EMS | Wayne | Public Safety | 25 |
| Southwest Summit County Public Safety | Summit | Public Safety | 24 |
| Middletown Police and Fire | Butler | Public Safety | 24 |
| Cleveland Police - West | Cuyahoga | Public Safety | 22 |
| Ashtabula County Fire Dispatch and Tac 1 | Ashtabula | Public Safety | 20 |
| Stark County Police | Stark | Public Safety | 20 |
| WestCom Fire and West Suburbs Police - Digital MARCS | Cuyahoga | Public Safety | 20 |
| Fulton County Public Safety | Fulton | Public Safety | 20 |
| Columbus Police Dispatch - Zone 3 | Franklin | Public Safety | 19 |
| Brown County Public Safety | Brown | Public Safety | 16 |
| Miami County Police, Fire and EMS - Central | Miami | Public Safety | 15 |
| Belmont County Fire and EMS | Belmont | Public Safety | 15 |
| Lakewood Police and Fire | Cuyahoga | Public Safety | 15 |
| Holmes County Fire and EMS | Holmes | Public Safety | 14 |
| Mercer County Fire / EMS, Trumbull and Mahoning Counties Fire, EMS / Police | Mahoning | Public Safety | 13 |
| Henry County Fire, EMS, Napoleon Police / Fire Dispatch | Henry | Public Safety | 13 |
| Garfield and Maple Heights Police - Digital | Cuyahoga | Public Safety | 13 |
| Perry County Fire and EMS | Perry | Public Safety | 13 |
| Tri County Public Safety | Columbiana | Public Safety | 12 |
| Tuscarawas County Fire and EMS | Tuscarawas | Public Safety | 12 |
| Wood County Sheriff Dispatch, Parkersburg PD/Fire, Belpre PD/Fire | Washington | Public Safety | 11 |
| Morgan County Public Safety | Morgan | Public Safety | 11 |
| Western Greene County Public Safety | Greene | Public Safety | 11 |
| Warren County Police, Fire, and EMS | Warren | Public Safety | 11 |
| Cleveland Fire and EMS | Cuyahoga | Public Safety | 11 |
| Findlay Fire, Hancock County Sheriff, Fire and EMS, Ohio State Highway Patrol
| Hancock | Public Safety | 10 |
| Macedonia, Northfield Village and Sagamore Hills Police, Fire / EMS | Summit | Public Safety | 10 |
| Madison County Public Safety | Madison | Public Safety | 9 |
| Lucas County Law Enforcement - Northwest Dispatch | Lucas | Public Safety | 8 |
| Ohio State Highway Patrol District 5 | Auglaize | Public Safety | 8 |
| Columbus Division of Fire, Franklin County Fire and EMS | Delaware | Public Safety | 8 |
| Delaware County Public Safety | Delaware | Public Safety | 8 |
| Summit County Fire and EMS | Summit | Public Safety | 8 |
| Jackson, Mason, and Meigs Counties Fire and EMS | Meigs | Public Safety | 7 |
| Sebring and Alliance - Police and Fire | Mahoning | Public Safety | 7 |
| Lucas County Law Enforcement - Southeast Dispatch | Lucas | Public Safety | 7 |
| Darke, Mercer, Randolph, Shelby and Jay Counties Fire and EMS | Darke | Public Safety | 7 |
| Ottawa County Public Safety | Ottawa | Public Safety | 7 |
| Butler County Public Safety | Butler | Public Safety | 7 |
| Hardin County Sheriff and Ohio State Patrol | Hardin | Public Safety | 7 |
| Twinsburg, Hudson and Reminderville Police, Fire / EMS | Summit | Public Safety | 7 |
| Pike County Public Safety | Pike | Public Safety | 6 |
| Rosemount Fire and EMS | Scioto | Public Safety | 6 |
| Lake Township and Walbridge Police | Wood | Public Safety | 6 |
| Henry County Public Safety (Police/Sheriff/Fire/EMS) | Henry | Public Safety | 6 |
| Stow Police and Fire | Summit | Public Safety | 6 |
| Hudson Police & Fire | Summit | Public Safety | 6 |
| Niles Police and Fire | Trumbull | Public Safety | 6 |
| Circleville PD and OSP Post65 | Pickaway | Public Safety | 6 |
| City of Urbana Police | Champaign | Public Safety | 6 |
| Trumbull County Public Safety | Trumbull | Public Safety | 6 |
| Wood County Fire Grounds | Wood | Public Safety | 5 |
| Pickaway County Fire/EMS | Pickaway | Public Safety | 5 |
| Huron / Erie County Public Safety | Erie | Public Safety | 5 |
| CSX Deshler Area Rail | Henry | Rail | 5 |
| Southwest Emergency Dispatch Center (SWEDC) | Cuyahoga | Public Safety | 4 |
| Medina County Fire, Wadsworth Fire and EMS | Medina | Public Safety | 4 |
| Cincinnati Fire | Hamilton | Public Safety | 4 |
| Wood County Fire / EMS Paging (North) | Wood | Public Safety | 4 |
| Chagrin Valley Dispatch - Brecksville | Cuyahoga | Public Safety | 3 |
| Harrison County Public Safety | Harrison | Public Safety | 3 |
| Coshocton County EMS | Coshocton | Public Safety | 3 |
| East Cleveland Police and Fire Dispatch | Cuyahoga | Public Safety | 3 |
| Washington County Public Safety | Washington | Public Safety | 3 |
| Westerville Police, Fire and EMS | Franklin | Public Safety | 3 |
| Fostoria Area Railroad Commmunications | Seneca | Rail | 3 |
| Delaware County Fire and EMS | Delaware | Public Safety | 2 |