ATSF
| Atchison Topeka & Santa Fe | 4 |
BCMX
| Bullet Concrete Materials Company | 1 |
BLE
| Bessemer & Lake Erie | 1 |
BM
| Boston & Maine | 1 |
BN
| Burlington Northern | 19 |
CBQ
| Chicago Burlington & Quincy | 6 |
CKRY
| Central Kansas Railway Incorporated | 3 |
CLAX
| Guardian Leasing Inc | 16 |
CN
| Canadian National Railways | 2 |
CO
| Chesapeake & Ohio | 3 |
CR
| Conrail | 2 |
CRR
| Clinchfield | 2 |
CSX
| CSX Railroad | 24 |
DMIR
| Duluth Missabe & Iron Range | 205 |
DRGW
| Denver & Rio Grande Western | 2 |
EJE
| Elgin Joliet and Eastern | 1 |
EL
| Erie Lackawanna | 10 |
GN
| Great Northern | 1 |
GNRR
| Georgia Northeastern | 1 |
IMRR
| Illinois Midland Railroad | 5 |
ITXX
| Tiaxcalteca de Industrias S.A. de C.V. | 4 |
KCS
| Kansas City Southern | 1 |
KO
| Kansas & Oklahoma | 4 |
KRL
| Kasgro Rail Lines | 1 |
LN
| Louisville & Nashville | 29 |
LSRC
| Lake State Railway Company | 21 |
MB
| Meridian & Bigbee | 15 |
MIDX
| MRC Rail Services LLP | 2 |
NBER
| Nittany and Bald Eagle Railroad Company | 12 |
NP
| Northern Pacific | 1 |
OLB
| Omaha Lincoln and Beatrice Railway Company | 1 |
OLDX
| Old Line Holding Company Incorporated | 1 |
PIOX
| Pioneer Americas LLC | 3 |
PRR
| Pennsylvania Railroad | 1 |
SAL
| Seaboard Air Line | 1 |
SBD
| Seaboard System | 19 |
SOU
| Southern | 1 |
SPSX
| Progress Rail Services Corp | 1 |
TLTX
| Tilcon Tomasso Quarries Incorporated | 2 |
TRAX
| RailAmerica | 1 |
TRLX
| Texas Railcar Leasing Company | 1 |
WAMX
| Webb Asset Management | 1 |
WDPX
| GASCOYNE MATERIALS HANDLING & RECYCLING, LLC | 3 |
WE
| Wheeling & Lake Erie | 78 |