| 1 | GNW | Genessee & Wyoming R.R. | 4/1961-10/1966 & 1/1975; eliminated 7/1975 | | NAKINA |
| 2 | GNW | Genessee & Wyoming R.R. | 4/61-10/66 & 1/75; eliminated 7/75 | | NRHS |
| 3 | GNW | GENESSEE & WYOMING RAILROAD CO. | | | PWRC |
| 4 | GNW | Genesee & Wyoming R.R. | | USA | TRAFFIC |
| 5 | GNWC | GREENWAY CARRIERS LLC | | | SCAC4 |
| 6 | GNWI | G & W TRANSPORTATION INC | | | SCAC4 |
| 7 | GNWQ | GREENWAY TRANSPORTATION INC | | | SCAC4 |
| 8 | GNWR | Genessee and Wyoming R.R. Co. | 7/1965-7/2005 | | NAKINA |
| 9 | GNWR | Genessee and Wyoming R.R. Co. | 7/65-7/2000 | | NRHS |
| 10 | GNWR | GENESEE & WYOMING RAILROAD CO. | | | PWRC |
| 11 | GNWR | Genesee and Wyoming Railroad | | | RSRV |
| 12 | GNWT | GOOD NEWS TRANSPORTATION INC | | | SCAC4 |
| 13 | GNWY | GREENWAY TRANSPORTATION INC | | | SCAC4 |
