| 1 | GNT | Business Air Ltd. | IATA: II, Callsign: Granite, Merged with British Midland Regional Limited on 05 February 2001. Established in 1987. Commenced operations in August 1987. | GB | AVCODES |
| 2 | GNT | Gintarines Avialinous | Callsign: Ginta, | LT | AVCODES |
| 3 | GNT | Joint Stock Company "Amber Air" Ltd | IATA: 0A, Callsign: Ginta, Ceased Operations | LT | AVCODES |
| 4 | GNT | Amber Air | IATA: 0A | | ICAO1 |
| 5 | GNTB | GREAT NORTHERN TRUCKING & CLEARING | | | SCAC4 |
| 6 | GNTC | GENNEX TRANSPORTATION INC | | | SCAC4 |
| 7 | GNTG | GREAT NORTHERN TRUCKING INC | | | SCAC4 |
| 8 | GNTJ | GERSAN TRANSPORT INC | | | SCAC4 |
| 9 | GNTK | GENTEK BUILDING PRODUCTS LTD | | | SCAC4 |
| 10 | GNTL | GREEN TRANSPORTATION INC | | | SCAC4 |
| 11 | GNTN | GRAND NATIONAL TRANSPORT LLC | | | SCAC4 |
| 12 | GNTQ | GRANITE TRANSPORT LIMITED | | | SCAC4 |
| 13 | GNTR | G N TRANSPORT LTD | | | SCAC4 |
| 14 | GNTS | GREAT NORTHERN TRANSPORTATION SYSTEM | | | PWRC |
| 15 | GNTS | GRAND TRANSPORTATION INC | | | SCAC4 |
| 16 | GNTT | DANTE GENTILINI TRUCKING INC | | | SCAC4 |
| 17 | GNTU | GENESIS CHEMICAL TANK CONTAINERS LLC | | UAE | BIC |
| 18 | GNTW | GREAT NORTHERN TRANSPORTATION INC | | | SCAC4 |
| 19 | GNTX | TTX Co. | added 1/2005; 7/2005 | | NAKINA |
| 20 | GNTX | Continental Tank Car Corp. | added 7/1962 | | NAKINA |
| 21 | GNTX | TTX CO. | | | PWRC |
| 22 | GNTX | TTX COMPANY | | | SCAC4 |
| 23 | GNTY | GENERAL TRANSYSTEMS INC | | | SCAC4 |
