MARCS, or Multi Agency Radio Communications System, is the State of Ohio's Motorola Digital 800 MHz trunking network, providing statewide voice and data communication for numerous state, county, and local government agencies.

The MARCS database is constantly growing and changing. We are providing a link to Tom Swisher's excellent MARCS frequency database. Tom lives near Columbus and can effectively monitor and verify a lot of the 800 MHz frequencies he publishes, and he has an exceptional attention to detail to make sure everything is right. Besides, he's a fellow Amateur Radio operator, a former co-worker, and a personal friend!

Here's the link: