| Frequency | System | FleetID | User | City | State | Sys_Type | Notes | Additional Notes |
| 860.4625 | Collin County, Texas | 112 | Allen FD (Dispatch/Ops) | Allen | TX | IIi | ** | ** |
| 868.125 | Collin County, Texas | 400-10 | Allen FD (EMS/Hospital) | Allen | TX | IIi | B3 = S4 | B4 = S4 |
| 866.0125 | Collin County, Texas | 944 | Anna/Weston FD | Anna | TX | IIi | B5 = S4 | B6 = S4 |
| 867.225 | Collin County, Texas | 1008 | Anna/Weston FD | Anna | TX | IIi | B7 = S4 | ** |
| 866.225 | Collin County, Texas | 144 | Blueridge FD (Primary) | Blueridge | TX | IIi | ** | ** |
| 867.5125 | Collin County, Texas | 176 | Branch FD | Branch | TX | IIi | ** | ** |
| 866.5125 | Collin County, Texas | 976 | Celina FD | Celina | TX | IIi | ** | ** |
| 867.725 | Collin County, Texas | 912 | County FD (Countywide) | McKinney | TX | IIi | ** | ** |
| 866.725 | Collin County, Texas | 848 | County FD (Inspectors) | McKinney | TX | IIi | ** | ** |
| 868.0125 | Collin County, Texas | 80 | County FD (Intercity) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 208 | Fairview FD | Fairview | TX | IIi | ** | ** |
| ** | Collin County, Texas | 200-4 | Fairview FD | Fairview | TX | IIi | ** | ** |
| ** | Collin County, Texas | 200-5 | Fairview FD | Fairview | TX | IIi | ** | ** |
| ** | Collin County, Texas | 240 | Farmersville FD | Farmersville | TX | IIi | ** | ** |
| ** | Collin County, Texas | 272 | Frisco FD (Dispatch) | Frisco | TX | IIi | ** | ** |
| ** | Collin County, Texas | 304 | Josephine FD | Josephine | TX | IIi | ** | ** |
| ** | Collin County, Texas | 336 | Lavon FD | Lavon | TX | IIi | ** | ** |
| ** | Collin County, Texas | 368 | Lowry Crossing FD | Lowry Crossing | TX | IIi | ** | ** |
| ** | Collin County, Texas | 400 | Lucas FD | Lucas | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1680 | McKinney FD (Dispatch) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 300-5 | McKinney FD (Engines) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 300-6 | McKinney FD (Medics) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 300-14 | McKinney FD (EMS/Hospital | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 2192 | Melissa FD | Melissa | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1712 | Murphy FD | Murphy | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1776 | Parker FD | Parker | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1808 | Plano FD | Plano | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1840 | Princeton FD | Princeton | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1040 | Prosper FD (Ch #1) | Prosper | TX | IIi | ** | ** |
| ** | Collin County, Texas | 16640 | Prosper FD (Ch #2) | Prosper | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1872 | Royce City FD | Royce City | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1904 | Westminister FD | Westminister | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1936 | Wylie FD | Wylie | TX | IIi | ** | ** |
| ** | Collin County, Texas | 400-1 | Allen PD (Dispatch) | Allen | TX | IIi | ** | ** |
| ** | Collin County, Texas | 400-5 | Allen PD (Info) | Allen | TX | IIi | ** | ** |
| ** | Collin County, Texas | 200-6 | Fairview PD | Fairview | TX | IIi | ** | ** |
| ** | Collin County, Texas | 4816 | Frisco PD (Dispatch) | Frisco | TX | IIi | ** | ** |
| ** | Collin County, Texas | 300-0 | McKinney PD (Dispatch) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 300-2 | McKinney PD | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 300-3 | McKinney PD | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 400-1 | Princeton PD | Princeton | TX | IIi | ** | ** |
| ** | Collin County, Texas | 16 | Sheriff (Common #1) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 48 | Sheriff (Common #2) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1264 | Sheriff (Constables) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1072 | Sheriff (Dispatch) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1200 | Sheriff (Emergency Resp.) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1168 | Sheriff (Field Ops) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1136 | Sheriff (Investigations) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 528 | Sheriff (Jail) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 560 | Sheriff (Jail Ops) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 592 | Sheriff (Jail Ops) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 2096 | Sheriff (Jail Ops) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1296 | Sheriff (Jail Transp.) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1424 | Sheriff (Narcotics/Vice) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1104 | Sheriff (NCIC/INFO) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1456 | Sheriff (Negotiators) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1328 | Sheriff (Talk #1) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1360 | Sheriff (Talk #2) | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 500-3 | McKinney Parks Dept. | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 500-1 | McKinney Streets Dept. | McKinney | TX | IIi | ** | ** |
| ** | Collin County, Texas | 1232 | Sheriff (Services Div.) | McKinney | TX | IIi | ** | ** |
| 867.0125 | Collin County, Texas | 400-9 | Allen FD (Channel 2) | Allen | TX | IIi | B0 = S0 | B2 = S4 |