| Champion Communication (Mechanicsville) |
LTR Standard |
Mechanicsville |
| DMR-MARC Amateur Radio Network (MD) |
DMR Conventional Networked |
Various |
| First Responders Interoperable Radio System Team (FIRST) |
Project 25 Phase II |
Various |
| FleetTalk (DC-Area Connect Plus) |
DMR Motorola Connect Plus (TRBO) |
Various |
| Interstate Repeater System |
DMR Conventional Networked |
Various |
| Joint National Capital Region |
Project 25 Phase II |
Various |
| St. Mary's County |
Project 25 Phase II |
Various |
| Washington Gas Light Company |
Project 25 Phase II |
Various, Multistate |
