| 1 | WRS | Western Rail Switching Inc. | 7/2005 | | NAKINA |
| 2 | WRS | WESTERN RAIL SWITCHING INC. | | | PWRC |
| 3 | WRS | WESTERN RAIL SWITCHING INC | | | SCAC4 |
| 4 | WRS | Westdeutsche Rail Service GmbH | | DE | VKM |
| 5 | WRSA | WORLDWIDE RELOCATION SPECIALISTSINC | | | SCAC4 |
| 6 | WRSC | WESTERN RESOURCES INC | | | SCAC4 |
| 7 | WRSCH | WRS Widmer Rail Services Personal AG | | CH | TRAFFIC |
| 8 | WRSCH | WRS Widmer Rail Services Personal AG | | CH | VKM |
| 9 | WRSE | WILD ROSE TRANSPORTATION SERVICES | | | SCAC4 |
| 10 | WRSF | WESTERN REFINERY SERVICES INC | | | SCAC4 |
| 11 | WRSH | Wrexham & Shropshire | | GB | TRAFFIC |
| 12 | WRSK | WIERSEMA TRUCKING CORPORATION | | | SCAC4 |
| 13 | WRSQ | WORLDWIDE RELOCATION SERVICES INC | | | SCAC4 |
| 14 | WRSSK | Wagon Rail Service, s.r.o. | | SK | VKM |
| 15 | WRSV | WALD RELOCATION SERVICES LTD | | | SCAC4 |
| 16 | WRSW | WRS ENVIRONMENTAL | | | SCAC4 |
| 17 | WRSX | Wheeler, Reynolds & Stauffer | 7/1937-4/1961; eliminated 1/1962 | | NAKINA |
| 18 | WRSX | Stauffer Chemical Co. (Western Branch) | added 1/1962; eliminated 1/1963 | | NAKINA |
| 19 | WRSX | Scholle Corp. | added 4/1973; 1/1975-1/1980; eliminated 4/1989 | | NAKINA |
| 20 | WRSX | Warren Railcar Service, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 21 | WRSX | Wheeler, Reynolds & Stauffer | 4/38-4/61; eliminated 1/62 | | NRHS |
| 22 | WRSX | Stauffer Chemical Co. (Western Branch) | added 1/62 | | NRHS |
| 23 | WRSX | Scholle Corp. | added 4/73; 1/75-1/80; eliminated 4/89 | | NRHS |
| 24 | WRSX | Warren Railcar Service, Inc. | Jul-00 | | NRHS |
| 25 | WRSX | *STAUFFER CHEMICAL CO. [WHEELER, REYNOLDS & STAUFFER] | | | PWRC |
| 26 | WRSX | *SCHOLLE CORP. | | | PWRC |
| 27 | WRSX | *WHITE RIVER SCENIC RAILROAD | | | PWRC |
| 28 | WRSX | +WARREN RAILCAR SERVICE, INC. | | | PWRC |
| 29 | WRSX | Wheeler, Reynolds & Stauffer (Scholle Corp) | | | RSRV |
| 30 | WRSX | WARREN RAILCAR SERVICE, INC. | | | SCAC4 |
