The obvious ones:
VFIRE21, 22, 23 are used by the fire depts
VLAW32 used by law enforcement
VMED38 is still used for ambulance reports.
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The remaining VCALL & VTAC frequencies are not regularly used, but may kick in outside the metro areas during large scale incidents.
7FIRE84D is the failsafe frequency for the fire depts in the SLATER region.
7CALL50D, 7TAC51D, 7TAC52D are programmed as alternatives to the trunking systems.
8CALL90 & 8TAC91 are setup as repeaters in St. Louis as part of the FBI 25 Cities program. I don't know the status of the systems.