| Frequency | Licensee | FleetID | Fleet User | City | State | Sys_Type | Notes | Additional Notes |
| 866.075 | CHARLES CO. PUBLIC SAFETY | 17040 | RANGE TESTING | LA PLATA | MD | II | APCO 25 | 3.6K |
| 866.325 | CHARLES CO. PUBLIC SAFETY | 17152 | RANGE TESTING | LA PLATA | MD | II | APCO 25 | 3.6K |
| 866.5625 | CHARLES CO. PUBLIC SAFETY | 17184 | RANGE TESTING | LA PLATA | MD | II | APCO 25 | 3.6K |
| 867.0625 | CHARLES CO. PUBLIC SAFETY | ** | ** | LA PLATA | MD | II | APCO 25 | 3.6K |
| 868.2625 | CHARLES CO. PUBLIC SAFETY | ** | ** | LA PLATA | MD | II | APCO 25 | 3.6K |
| 868.375 | CHARLES CO. PUBLIC SAFETY | ** | ** | LA PLATA | MD | II | APCO 25 | 3.6K |
| 868.65 | CHARLES CO. PUBLIC SAFETY | ** | ** | LA PLATA | MD | II | APCO 25 | 3.6K |
| 868.65 | CHARLES CO. PUBLIC SAFETY | ** | ** | LA PLATA | MD | II | APCO 25 | 3.6K |
| 868.9 | CHARLES CO. PUBLIC SAFETY | ** | ** | LA PLATA | MD | II | APCO 25 | 3.6K |