| 1 | GLR | Central Mountain Air Ltd. | IATA: 9M, Callsign: Glacier, IATA Prefix: 634, Formerly Central Mountain Air Services Ltd. | CDN | AVCODES |
| 2 | GLR | Central Mountain Air | | | ICAO1 |
| 3 | GLRA | GOLDER ASSOCIATES LTD | | | SCAC4 |
| 4 | GLRE | G & L BROKERS | | | SCAC4 |
| 5 | GLRF | GLADIEUX TRADING & MARKETING CO LP | | | SCAC4 |
| 6 | GLRG | GOODLUCK REFRIGERATION SERVICE INC | | | SCAC4 |
| 7 | GLRP | GLASROCK PRODUCTS INC | | | SCAC4 |
| 8 | GLRQ | G T L R INC | | | SCAC4 |
| 9 | GLRR | Gerhard Lang GmbH & Co. KG | | DE | VKM |
| 10 | GLRU | LLC EAST GLOBAL LOGISTICS | | RUS | BIC |
| 11 | GLRV | GLAMOUR MOVING COMPANY | | | SCAC4 |
| 12 | GLRX | Georgetown Loop R.R., Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 13 | GLRX | Georgetown Loop R.R., Inc. | Jul-00 | | NRHS |
| 14 | GLRX | GEORGETOWN LOOP RAILROAD | | | PWRC |
| 15 | GLRX | Georgetown Loop Railroad | | | RSRV |
| 16 | GLRX | GEORGETOWN LOOP RAILROAD INC | | | SCAC4 |
| 17 | GLRY | GUILLORY PETROLEUM TRANSPORT LLC | | | SCAC4 |
