ACL
| Atlantic Coast Line | 1 |
AGR
| Alabama and Gulf Coast | 1 |
AKMD
| Arkansas Midland Railroad Company | 2 |
ASAB
| Bay Line Railroad LLC | 2 |
ATSF
| Atchison Topeka & Santa Fe | 6 |
BAEX
| Andersons | 1 |
BAR
| Bangor & Aroostook | 9 |
BAYL
| Bay Line, LLC | 1 |
BCLR
| Bay Colony | 1 |
BCOL
| Canadian National Railways | 8 |
BN
| Burlington Northern | 1 |
BO
| Baltimore & Ohio | 1 |
CBQ
| Chicago Burlington & Quincy | 2 |
CGW
| Chicago Great Western | 1 |
CHTT
| Chicago Heights Terminal Transfer | 3 |
CIC
| Cedar Rapids & Iowa City | 6 |
CIL
| Chicago Indianapolis & Louisville (Monon | 1 |
CMHX
| CarMath Incorporated | 1 |
CN
| Canadian National Railways | 6 |
CNA
| Canadian National Railways | 3 |
CNIS
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 8 |
CO
| Chesapeake & Ohio | 1 |
CP
| Canadian Pacific Railway | 8 |
CR
| Conrail | 13 |
CRIP
| Chicago Rock Island & Pacific | 1 |
CSS
| Chicago South Shore And South Bend | 1 |
CSX
| CSX Railroad | 2 |
CV
| Central Vermont | 2 |
CVC
| Canadian National Railways | 2 |
DME
| Dakota, Minnesota and Eastern | 6 |
DMN
| Duluth Missabe and Northern Railway | 1 |
DRGW
| Denver & Rio Grande Western | 2 |
DTI
| Detroit Toledo & Ironton | 5 |
DWC
| Canadian National Railways | 7 |
EEC
| East Erie Commercial Railroad | 1 |
ELS
| Escanaba and Lake Superior Railroad Comp | 3 |
FXE
| Ferromex | 1 |
GARX
| General American Marks Company | 3 |
GMRC
| Green Mountain RR | 3 |
GMSR
| Kansas City Southern | 1 |
GTW
| Grand Trunk Western | 13 |
HATX
| Helm Financial Corporation | 1 |
HCGX
| COMPASS MINERALS INTERNATIONAL INC | 1 |
HPJX
| Helm-Pacific Leasing | 2 |
HS
| H and S Railroad Company | 4 |
IATR
| Iowa Traction Railroad Company | 8 |
IC
| Illinois Central | 2 |
ICG
| Illinois Central Gulf | 3 |
KCS
| Kansas City Southern | 16 |
KELX
| Kellogg Company | 1 |
LBR
| Lowville and Beaver River Railroad Compa | 2 |
LN
| Louisville & Nashville | 3 |
MDW
| Minnesota Dakota and Western Railway Com | 1 |
MEC
| Maine Central | 14 |
MET
| Modesto and Empire Traction Company | 1 |
MILW
| Milwaukee Road | 10 |
MMA
| Montreal, Maine & Atlantic | 6 |
MNS
| Minneapolis Northfield & Southern | 1 |
MON
| Monon Route | 12 |
MP
| Missouri Pacific | 17 |
MPCX
| Michels Corporation | 3 |
MQT
| Marquette Rail | 9 |
MRL
| Montana Rail Link | 3 |
MSTL
| Minneapolis & St Louis | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NKP
| Nickel Plate | 5 |
NS
| Norfolk Southern | 6 |
NSHR
| North Shore | 1 |
NW
| Norfolk & Western | 10 |
ONT
| Ontario Northland Railway | 15 |
PC
| Penn Central | 1 |
PGR
| Progressive Rail, Inc | 1 |
PM
| Pere Marquette | 1 |
PREX
| Pioneer Rail Equipment | 3 |
PRR
| Pennsylvania Railroad | 3 |
PSMX
| Esco Corporation | 2 |
QGRY
| Quebec Gatineau Railway Incorporated | 1 |
RBOX
| Railbox Company | 1 |
SBD
| Seaboard System | 1 |
SIRX
| Southern Illinois Railcar Company | 1 |
SLC
| San Luis Central Railroad Company | 1 |
SLR
| St Lawrence & Atlantic | 1 |
SLSF
| Saint Louis-San Francisco | 13 |
SOO
| Soo Line | 4 |
SOU
| Southern | 18 |
SP
| Southern Pacific | 8 |
SRN
| Sabine River & Northern | 1 |
SRY
| Southern Railway of British Columbia Lim | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 3 |
STE
| Stockton Terminal and Eastern RR | 2 |
TCWR
| Twin Cities and Western | 1 |
UP
| Union Pacific Railroad Company | 6 |
WAB
| Wabash | 11 |
WC
| Wisconsin Central | 12 |
WCCL
| Wisconsin Central | 1 |
WCOR
| Wellsboro and Corning Railroad Company | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 1 |
WP
| Western Pacific | 15 |
WSOR
| Wisconsin & Southern | 24 |
WTRM
| Warren and Trumbull Railroad Company | 1 |
YKR
| York Rail | 1 |