Copied from Lemscate on a different post, found here:
http://www.railroadfan.com/phpbb/viewtopic.php?t=1828
This oughta help ya out. My own personal list! Yoinked from many sources, plus my own notes.
MICHIGAN RAILROAD RADIO FREQUENCIES - LP
rev. 2006-MAR-16
RAILROAD (REPORTING MARKS)
MHz AAR [ROAD FREQ #] DESCRIPTION
End of Train Device (EOT)
457.9375 [CP507] End of Train Telemetry
452.9375 [CP508] Head to End Telemetry (Canada)
Adrian & Blissfield (ADBF)
160.650 36 All operations
161.220 74 Riga interchange
Amtrak (AMTK)
151.515 Union Station Police
160.305 13 Passenger services
160.365 17 Union Station Police
160.545 29 Special agents
160.740 42 Shop
161.205 73 Car department
160.395 19 MoW
161.325 81 MoW - Road (Porter, IN to Kalamazoo, MI)
160.245 09 Police (Detroit)
161.265 77 Police (Mutual Aid)
161.505 93 Police (Detroit)
Ann Arbor (AA)
161.355 83 Switch/General Operations
161.490 92 Road & Ottawa Yard, Toledo
CN / Illinois Central Michigan District (CN/IC) (GTW)
160.530 28 [2] Dispatcher
161.220 74 Dispatcher for Flint Sub (TD3) Road (ex-DT&I)
160.590 32 [1] Road
160.920 54 Road (ex-DT&S)
160.680 38 Yard
160.740 42 Yard
160.845 49 [3] Yard
161.040 62 Yard
160.950 56 [4] MoW
160.980 58 PBX
161.010 60 PBX
160.905 53 Special Agents
161.280 78 Police
160.440 22 Police
160.470 24 Police (Detroit Area)
Central Michigan (CMGN)
161.280 78 [1] Road
161.310 80 [2] Yard, LSRC interchange, Bay City
CSX (CSXT)
160.320 14 Dispatcher AW (ex-Chessie)
160.635 35 Dispatcher BX
161.370 84 Dispatcher AX (ex-SBD)
160.230 8 Road (ex-Chessie)
160.290 12 Yard
160.530 28 Yard (ex-Chessie)
160.740 42 Yard
161.160 70 Yard
161.280 78 Yard
161.460 90 Yard
160.890 52 Ch. Y1
160.785 45 MoW/Engineering
160.980 58 PBX
160.275 11 Carmen
160.875 51 Police
161.295 79 Police
Coe Rail
161.025 61 General Operations
Delray Connecting
153.050 Mill Operations
153.080 Plant Operations
Grand Rapids & Eastern (GR / MMRR)
161.235 75 General Operations
Huron & Eastern (HESR)
161.355 83 Dispatcher
160.440 22 Road & Yard
160.380 18 FCC - Base & Mobile
161.400 86 FCC - Base & Mobile
Indiana & Ohio (IORY)
161.220 74 Road (ex-DT&I)
161.385 85 Road
160.575 31 Yard
Indiana Northeastern (IN)
161.400 86 Dispatcher
161.100 66 Road & Yard
Lake States (LSRC)
161.310 80 [1] General Operations
161.280 78 [2] Administration
160.350 16 [3] Limited Use
Marquette Rail (MQT)
160.440 22 Road
161.310 80 Yard
Michigan Shore (MS / MMRR)
161.235 75 General Operations
161.520 94 General Operations
Michigan Southern (MSO)
160.755 43 General Operations
Mid-Michigan Railroad (MMRR)
161.145 69 General Operations
161.235 75 General Operations
160.815 47 MoW
154.570 FCC - Mobiles
154.600 FCC - Mobiles
Norfolk Southern (NS)
160.440 22 Road
160.800 46 [1] Road
161.070 64 [2] Yard
160.860 50 [3] Yard
160.980 58 [4] Yard
161.250 76 Yard - Oakwood
160.380 18 Yard - Melvindale (Car Dept.)
160.620 34 Yard - Melvindale (Car Dept.)
161.115 67 End of Train Telemetry
160.515 27 PBX {9}
161.235 75 PBX {9}
161.280 78 Police (Mutual Aid)
161.205 73 Police (Car to Car)
160.305 13 Police (Car to Car)
Saginaw Bay & Southern (SBS)
161.310 80 General Operations
Saginaw Valley (SGVY)
161.400 86 General Operations
Tuscola & Saginaw Bay (TSBY)
160.575 31 [1] Road and Dispatcher
161.100 66 [2] Car shops
West Michigan (WMI)
161.025 61 General Operations
MICHIGAN RAILROAD RADIO FREQUENCIES - UP
rev. 2006-MAR-16
RAILROAD (REPORTING MARKS)
MHz AAR [ROAD FREQ #] DESCRIPTION
Algoma Central (ACRI)
160.530 28 [1] Road
160.575 31 [2] Yard
160.605 33 [3] Yard
Escanaba & Lake Superior (ELS)
160.320 14 [1] Road
161.550 96 [1] Road / Yard
161.310 80 [2] Road
160.290 12 [2] Road / Yard
Lake Superior & Ishpeming (LS&I)
160.230 8 Road / Repeater
161.370 84 Yard
161.490 92 Yard / Repeater
160.950 56 West Yard / MoW
161.205 73 Police
156.800 Ore Dock - Ship to Shore
Port Dolomite (US Steel / Michigan Limestone Operations) (non-CC)
{unknown}
Port Inland (Inland Steel/Inland Lime & Stone / Michigan Limestone Operations) (non-CC)
{unknown}
Wisconsin Central (CN/WC)
160.785 45 [1] Road / Dispatch (East)
160.260 10 [2] Road / Dispatch (North)
161.295 79 [3] Road / Dispatch (South/West)
160.335 15 [4] Road / Dispatch (Central/North)
160.215 7 Road / Dispatch (South)
160.845 49 [5] Yard
161.070 64 [6] Yard / Shops
161.250 76 [7] Yard
161.385 85 [8] Yard
160.965 57 Yard
160.575 31 Yard
161.190 72 Yard
161.445 89 Yard