| 1 | NAH | Nahanni Air Services Ltd. | Callsign: Nahanni, | CDN | AVCODES |
| 2 | NAH | Nahanni Air Services Ltd | | | ICAO1 |
| 3 | NAHA | Naha Bus Co. | | J | TRAFFIC |
| 4 | NAHC | NATIONWIDE HORSE CARRIERS INC | | | SCAC3 |
| 5 | NAHG | NAT SHIPPING | | | SCAC4 |
| 6 | NAHI | NEWMAN, A H INC | | | SCAC4 |
| 7 | NAHL | NORTHEAST AUTO HAUL | | | SCAC4 |
| 8 | NAHM | NORTH AMERICAN MOVING & STORAGE | | | SCAC4 |
| 9 | NAHN | NORTH-AIR HELICOPTERS INC | | | SCAC4 |
| 10 | NAHU | NORTH AMERICAN HELIUM | | CDN | BIC |
| 11 | NAHU | NAVISMART PRIVATE LIMITED | | | SCAC4 |
| 12 | NAHX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 13 | NAHX | General Electric Railcar Services Corp. | added 1/1984; 1/1994; eliminated 1/2000 | | NAKINA |
| 14 | NAHX | North American Car Corp. | 1/1952-1/1980; eliminated 1/1984 | | NAKINA |
| 15 | NAHX | North American Car Corp. | 1/52-1/80 | | NRHS |
| 16 | NAHX | General Electric Railcar Services Corp. | 1/94; eliminated 1/2000 | | NRHS |
| 17 | NAHX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 18 | NAHX | (NATX) G. E. RAIL SERVICES CORP - WONDER/HOSTESS, LESSOR | | | PWRC |
| 19 | NAHX | GE Rail Services | | | RSRV |
| 20 | NAHX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 21 | NAHX | North American Car Corp. | | USA | TRAFFIC |
