ADBF
| Adrian and Blissfield Rail Road Company | 5 |
AMTK
| Amtrak | 11 |
AWP
| Atlanta & West Point | 1 |
BNSF
| BNSF Railway | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CN
| Canadian National Railways | 4 |
CP
| Canadian Pacific Railway | 7 |
CRIP
| Chicago Rock Island & Pacific | 1 |
CSX
| CSX Railroad | 3 |
DMIR
| Duluth Missabe & Iron Range | 5 |
DOTX
| USDOT/Federal Railroad Administration | 2 |
DRGW
| Denver & Rio Grande Western | 1 |
EJE
| Elgin Joliet and Eastern | 4 |
FEC
| Florida East Coast | 4 |
GF
| Georgia & Florida | 2 |
GN
| Great Northern | 1 |
IAIS
| Iowa Interstate | 2 |
IC
| Illinois Central | 5 |
LV
| Lehigh Valley | 1 |
MP
| Missouri Pacific | 1 |
NKP
| Nickel Plate | 5 |
NN
| Northern Nevada Railroad Corporation | 2 |
NP
| Northern Pacific | 1 |
NS
| Norfolk Southern | 16 |
NW
| Norfolk & Western | 19 |
OHCR
| Ohio Central | 4 |
PPCX
| AAPRCO Register Private Cars | 11 |
PULL
| Pullman | 1 |
RBMN
| Reading Blue Mountain & Northern | 2 |
RGS
| Rio Grande Southern | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 4 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 4 |
UP
| Union Pacific Railroad Company | 1 |
WAB
| Wabash | 3 |
WE
| Wheeling & Lake Erie | 1 |
YW
| Yreka Western Railroad Company | 1 |