ACL
| Atlantic Coast Line | 2 |
ALAB
| Alabama Railroad | 4 |
AR
| Aberdeen and Rockfish | 7 |
ATW
| Atlantic and Western | 32 |
BN
| Burlington Northern | 12 |
BNSF
| BNSF Railway | 11 |
BO
| Baltimore & Ohio | 2 |
CAMY
| CAMP CHASE RAILWAY COMPANY, LLC | 12 |
CP
| Canadian Pacific Railway | 66 |
CPAA
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 367 |
DR
| Dardanelle and Russellville Railroad Inc | 2 |
EEC
| East Erie Commercial Railroad | 6 |
FXE
| Ferromex | 1 |
GNRR
| Georgia Northeastern | 3 |
GNWR
| Genesee and Wyoming Railroad Company | 9 |
IC
| Illinois Central | 22 |
ICG
| Illinois Central Gulf | 7 |
KCS
| Kansas City Southern | 68 |
KXHR
| Knoxville & Holston River RR | 11 |
LRS
| Laurinburg and Southern | 13 |
LXOH
| Knoxville & Holston River Railroad | 1 |
MQT
| Marquette Rail | 8 |
MSDR
| Knoxville & Holston River Railroad | 1 |
NCYR
| Nash County Railroad Corporation | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NOPB
| New Orleans Public Belt Railroad | 1 |
NS
| Norfolk Southern | 217 |
PAL
| Paducah & Louisville | 1 |
PRL
| Penn Eastern Rail Lines Incorporated | 1 |
RGCX
| Rio Grande Chemical LTD | 5 |
RJCC
| R.J. Corman Railroad/Kentucky Lines | 7 |
SAL
| Seaboard Air Line | 3 |
SBD
| Seaboard System | 3 |
SCL
| Seaboard Coast Line | 1 |
SIND
| Southern Indiana Railway Incorporated | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SOU
| Southern | 416 |
SRN
| Sabine River & Northern | 3 |
WC
| Wisconsin Central | 6 |
WCCL
| Wisconsin Central | 25 |
WGCR
| Wiregrass Central Railroad. Incorporated | 6 |
WRWK
| Providence & Worchester Railroad | 1 |
YVRR
| Yadkin Valley | 3 |