| 1 | LOCX | L.A. Colo LLC | added 1/2010 | | NAKINA |
| 2 | LOCX | L.A. Colo & Sons Inc. | eliminated 1/2010 | | NAKINA |
| 3 | LOCX | Mobile Locomotive Services, Inc. | 7/2005 (not listed) | | NAKINA |
| 4 | LOCX | American Refrigerator Transit Co. | added 1/1965; 7/1965-1/1975; eliminated 10/1976 | | NAKINA |
| 5 | LOCX | American Refrigerator Transit Co. | added 1/65; 7/65-1/75 | | NRHS |
| 6 | LOCX | *AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 7 | LOCX | +MOBILE LOCOMOTIVE SERVICES, INC. | | | PWRC |
| 8 | LOCX | MOBILE LOCOMOTIVE SERVICES, INC. | | | PWRC |
| 9 | LOCX | Mobile Locomotive Services Inc. | | | RSRV |
| 10 | LOCX | L A COLO LLC | | | SCAC4 |
