| Pittsburgh Police, Fire and EMS | Allegheny | Public Safety | 403 |
| Westmoreland County Public Safety | Westmoreland | Public Safety | 125 |
| Fayette County ICORRS Public Safety Dispatch | Fayette | Public Safety | 104 |
| Schuylkill County Fire | Schuylkill | Public Safety | 98 |
| Armstrong County Public Safety | Armstrong | Public Safety | 92 |
| Franklin County Fire and EMS Alerts | Franklin | Public Safety | 87 |
| Blair County EMS, Fire, Police, Hazmat and Helos | Blair | Public Safety | 84 |
| Somerset County Fire and EMS - Digital | Somerset | Public Safety | 75 |
| Adams County Fire and EMS - Digital | Adams | Public Safety | 67 |
| Indiana County Fire Dispatch and Fireground Operations | Indiana | Public Safety | 56 |
| Huntingdon County Fire and EMS | Huntingdon | Public Safety | 53 |
| Lycoming County Public Safety | Lycoming | Public Safety | 53 |
| Tioga County Police, Fire and EMS | Tioga | Public Safety | 51 |
| York County Fire | York | Public Safety | 51 |
| Erie County Fire and EMS | Erie | Public Safety | 51 |
| Mifflin County Fire and EMS | Mifflin | Public Safety | 49 |
| Bedford County Fire, EMS and Law | Bedford | Public Safety | 47 |
| Clarion County Public Safety | Clarion | Public Safety | 45 |
| Clearfield County Fire and EMS | Clearfield | Public Safety | 44 |
| Dauphin County Fire and EMS Dispatch - Digital | Dauphin | Public Safety | 44 |
| Northumberland County Fire and EMS | Northumberland | Public Safety | 42 |
| Berks County Fire and EMS - Digital | Berks | Public Safety | 40 |
| Centre and Clearfield Counties Fire | Centre | Public Safety | 35 |
| Susquehanna, Wayne, Lackawanna, and Wyoming Counties Fire / EMS | Lackawanna | Public Safety | 31 |
| Crawford County Fire and EMS - Central | Crawford | Public Safety | 29 |
| Allegheny County Police, Fire and EMS - Southern Areas | Allegheny | Public Safety | 28 |
| Perry County Fire and EMS | Perry | Public Safety | 28 |
| Butler County Fire and EMS | Butler | Public Safety | 27 |
| Clinton County Public Safety | Clinton | Public Safety | 26 |
| Warren County Sheriff, Fire and EMS Dispatch | Warren | Public Safety | 25 |
| Fayette County Public Safety Dispatch | Fayette | Public Safety | 25 |
| Juniata County Fire and EMS | Juniata | Public Safety | 23 |
| Cambria County Fire and EMS | Cambria | Public Safety | 23 |
| Luzerne County Fire and EMS | Luzerne | Public Safety | 22 |
| Washington City Fire, County Zone 1 Fire and EMS | Washington | Public Safety | 20 |
| Lawrence County Fire and EMS - North | Lawrence | Public Safety | 20 |
| Elk County Police, Fire and EMS | Elk | Public Safety | 19 |
| Allegheny County East PD 1 and East PD 3 | Allegheny | Public Safety | 18 |
| Philadelphia Police - Citywide | Philadelphia | Public Safety | 18 |
| Lebanon County Fire | Lebanon | Public Safety | 18 |
| Philadelphia Fire Dispatch - North | Philadelphia | Public Safety | 17 |
| Delaware County Public Safety | Delaware | Public Safety | 17 |
| Carlisle Fire and EMS Dispatch | Cumberland | Public Safety | 16 |
| Philadelphia Police Dispatch - Northeast | Philadelphia | Public Safety | 16 |
| Philadelphia Police Dispatch - South | Philadelphia | Public Safety | 15 |
| Venango County Police, Fire, and EMS | Venango | Public Safety | 14 |
| Lancaster County Fire and EMS - Digital | Lancaster | Public Safety | 14 |
| Potter and McKean County Fire and EMS | McKean | Public Safety | 12 |
| Delaware County Fire/EMS - Countywide Ops | Delaware | Public Safety | 12 |
| Mercer County Fire / EMS, Trumbull and Mahoning Counties Fire, EMS / Police | Mercer | Public Safety | 12 |
| Pittsburgh Police Dispatch | Allegheny | Public Safety | 12 |
| Beaver County Fire and EMS | Beaver | Public Safety | 11 |
| McKean County Public Safety, Elk County Fire | Elk | Public Safety | 11 |
| Chester County Fire/EMS - Digital | Chester | Public Safety | 11 |
| Lehigh County Fire and Northampton County Fire Tac-5 | Lehigh | Public Safety | 11 |
| Philadelphia Fire - South Fire/South Medics | Philadelphia | Public Safety | 11 |
| East Central Emergency Network Fire and EMS | Columbia | Public Safety | 11 |
| Montgomery County Fire and EMS - Digital | Montgomery | Public Safety | 11 |
| Montgomery County Fire and EMS - East | Montgomery | Public Safety | 11 |
| Armstrong/Westmoreland Public Safety | Armstrong | Public Safety | 10 |
| Columbia and Montour County Fire and EMS Dispatch | Columbia | Public Safety | 10 |
| Perry County Emergency Services | Perry | Public Safety | 10 |
| Pike County and Lackawaxen Fire and EMS | Pike | Public Safety | 10 |
| Venango County Fire Departments, Oil City Police | Venango | Public Safety | 9 |
| Dauphin County Fire - Digital | Dauphin | Public Safety | 9 |
| McKean County / Bradford Area Fire/EMS | McKean | Public Safety | 8 |
| Allegheny County Fire - East | Allegheny | Public Safety | 8 |
| Bucks County Fire - South/Ops | Bucks | Public Safety | 8 |
| Washington County Police Zone 3 | Washington | Public Safety | 8 |
| Lycoming County Fire and EMS Dispatch | Lycoming | Public Safety | 7 |
| Chester County Law Enforcement Dispatch | Chester | Public Safety | 7 |
| Centre County Fire and EMS | Centre | Public Safety | 7 |
| Delaware County Police - PD Sector 5 | Delaware | Public Safety | 7 |
| Northampton County Police | Northampton | Public Safety | 7 |
| Snyder County Fire and EMS | Snyder | Public Safety | 7 |
| Union County Fire | Union | Public Safety | 6 |
| Washington County Police Zone 1 | Washington | Public Safety | 6 |
| Allegheny County Fire - North | Allegheny | Public Safety | 6 |
| Butler County Public Safety | Butler | Public Safety | 6 |
| Mercer County Fire/EMS | Mercer | Public Safety | 6 |
| Lebanon County EMS, Fire Police and Hazmat | Lebanon | Public Safety | 6 |
| Central Pennsylvania Fire and EMS | Cumberland | Public Safety | 6 |
| Carbon County Fire and EMS Dispatch | Carbon | Public Safety | 6 |
| Delaware County Police - PD Sector 3 | Delaware | Public Safety | 6 |
| Lehigh County Police | Lehigh | Public Safety | 5 |
| Jefferson, Clearfield and Elk Counties Fire | Clearfield | Public Safety | 5 |
| Central Susquehanna Regional 911 | Union | Public Safety | 5 |
| Westmoreland County Fire | Westmoreland | Public Safety | 5 |
| Emlenton Police, Fire and EMS | Venango | Public Safety | 5 |
| CSX Railroad Erie to Buffalo | Erie | Rail | 5 |
| Luzerne County Fire - Wilkes Barre Fire & EMS | Luzerne | Public Safety | 5 |
| Washington County Police Zone 2 | Washington | Public Safety | 5 |
| Bucks County Fire North and OPs | Bucks | Public Safety | 5 |
| Franklin County Fire Operations | Franklin | Public Safety | 5 |
| Jefferson County Fire | Jefferson | Public Safety | 5 |
| Bucks County Fire - East | Bucks | Public Safety | 5 |
| North Fire Dispatch 6 | Allegheny | Public Safety | 5 |
| Monroe County Fire and EMS Dispatch | Monroe | Public Safety | 5 |
| Pittsburgh Fire Ground 2 | Allegheny | Public Safety | 5 |
| Fulton County Fire and EMS | Fulton | Public Safety | 5 |