The  American Association of Railroad Frequencies (AAR)

Railroad scanning in the US and Canada is fairly straight forward thanks to the American Association of Railroads (AAR).

The AAR assigned channel numbers to all 96 frequencies in the 160-161 MHz band.

Channel Number Frequency   Channel Number Frequency
2 159.810   52 160.890
3 159.930   53 160.905
4 160.050   54 160.920
5 160.185   55 160.935
6 160.200   56 160.950
7 160.215   57 160.965
8 160.230   58 160.980
9 160.245   59 160.995
10 160.260   60 161.010
11 160.275   61 161.025
12 160.290   62 161.040
13 160.305   63 161.055
14 160.320   64 161.070
15 160.335   65 161.085
16 160.350   66 161.100
17 160.365   67 161.115
18 160.380   68 161.130
19 160.395   69 161.145
20 160.410   70 161.160
21 160.425   71 161.175
22 160.440   72 161.190
23 160.455   73 161.205
24 160.470   74 161.220
25 160.485   75 161.235
26 160.500   76 161.250
27 160.515   77 161.265
28 160.530   78 161.280
29 160.545   79 161.295
30 160.560   80 161.310
31 160.575   81 161.325
32 160.590   82 161.340
33 160.605   83 161.355
34 160.620   84 161.370
35 160.635   85 161.385
36 160.650   86 161.400
37 160.665   87 161.415
38 160.680   88 161.430
39 160.695   89 161.445
40 160.710   90 161.460
41 160.725   91 161.475
42 160.740   92 161.490
43 160.755   93 161.505
44 160.770   94 161.520
45 160.785   95 161.535
46 160.800   96 161.550
47 160.815   97 161.565
48 160.830      
49 160.845      
50 160.860      
51 160.875