ATZ
| Santa Fe | 4 |
AVAZ
| CSX TRANSPORTATION, INC. | 11 |
AXXZ
| Agricultural Express of America | 1 |
BMDZ
| Minnesota Dakota and Western Railway Com | 1 |
BNO
| Burlington Northern and Santa Fe Railway Company | 1 |
BNSF
| BNSF Railway | 1 |
BNZ
| Burlington Northern and Santa Fe Railway | 1 |
BOZ
| Baltimore & Ohio | 1 |
CNWZ
| Chicago & Northwestern | 3 |
COEZ
| Crab Orchard and Egyptian Railroad | 1 |
CRMU
| Norfolk Southern Railway Company | 3 |
CRZ
| Conrail Trailer | 4 |
EMCZ
| Evergreen International (USA) Corporation | 1 |
ENGZ
| England | 2 |
FNLZ
| FedEx National LTL | 3 |
FNM
| Ferrocarriles Nacionales de Mexico | 1 |
FSTZ
| Fastrac Intermodal LLC | 5 |
HJCZ
| HANJIN Container Lines Limited | 1 |
ICRZ
| Illinois Central Railroad Company | 4 |
ICZ
| Illinois Central | 1 |
IMXZ
| Intermodal Express Incorporated | 1 |
KBSZ
| Kankakee Beaverville and Southern Railroad | 2 |
MECZ
| MECZ | 1 |
NWZ
| Norfolk & Western | 3 |
PFCZ
| PFCZ | 1 |
PFE
| Pacific Fruit Express | 1 |
PFTZ
| PFTZ | 3 |
PIEZ
| PIEZ | 1 |
PMTZ
| Union Pacific Railroad Company | 11 |
RDWZ
| Roadway Express Incorporated | 1 |
REAZ
| Transamerica Leasing Incorporated | 11 |
REDZ
| REDON Incorporated | 5 |
RGTZ
| Union Pacific Railroad Company | 6 |
SBDZ
| CSX Transportation Incorporated | 1 |
SFTT
| SFTT | 1 |
SFTZ
| Santa Fe | 37 |
SFVZ
| Burlington Northern and Santa Fe Railway Company | 3 |
SOUZ
| Norfolk Southern Railway Company | 1 |
SPLZ
| Southern Pacific | 5 |
TRIZ
| TRIZ | 1 |
UPSZ
| United Parcel Service | 1 |
UPZ
| Union Pacific Railroad Company | 3 |
USAZ
| XTRA Intermodal | 2 |
USFZ
| USFZ | 2 |
VIPZ
| Vermont Railway | 1 |
VTRZ
| Vermont Railway Incorporated | 1 |
WERZ
| Werner Enterprises Incorporated | 1 |
XTRZ
| XTRA Intermodal | 7 |