AMMC
| AMMC | 7 |
ATEX
| Asplundh Tree Expert Co Railroad Division | 3 |
BM
| Boston & Maine | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 37 |
BO
| Baltimore & Ohio | 3 |
BRBX
| Bombardier Transportation | 1 |
CL
| CL | 1 |
CN
| Canadian National Railways | 647 |
CP
| Canadian Pacific Railway | 607 |
CR
| Conrail | 12 |
CSX
| CSX Railroad | 166 |
CWCX
| Canandaigua Wine Company Incorporated | 5 |
DL
| Delaware-Lackawanna Railroad Company | 4 |
EL
| Erie Lackawanna | 2 |
GREX
| Georgetown Rail Equipment Company | 18 |
HZGX
| Herzog Contracting Corporation | 14 |
IAIS
| Iowa Interstate | 2 |
IC
| Illinois Central | 4 |
ICE
| Iowa Chicago and Eastern | 2 |
IHB
| Indiana Harbor Belt | 5 |
LMIX
| Loram Maintenance of Way Inc. | 25 |
MEC
| Maine Central | 1 |
METX
| METRA | 1 |
MMA
| Montreal, Maine & Atlantic | 1 |
MP
| Missouri Pacific | 2 |
NS
| Norfolk Southern | 137 |
NW
| Norfolk & Western | 7 |
NYC
| New York Central | 1 |
OTRX
| On-Track Railway Services Limited | 2 |
PRR
| Pennsylvania Railroad | 1 |
QCM
| Quebec Cartier Railroad | 2 |
QGRY
| Quebec Gatineau Railway Incorporated | 3 |
RTCX
| Union Tank Car Company | 4 |
SETX
| Sersa | 15 |
SOU
| Southern | 9 |
SRS
| Sperry Rail Service | 9 |
SRX
| SRX | 1 |
STLH
| St. Lawrence & Hudson | 5 |
UP
| Union Pacific Railroad Company | 46 |
URMX
| URMX | 7 |
VB
| Van Buren Bridge Company (Bangor & Aroostook) | 14 |
VMTX
| VMTX | 1 |
VSR
| Valley & Siletz RR | 1 |