| 1 | NIG | Aero Contractors Company of Nigeria Ltd. | IATA: NU, Callsign: Aeroline, IATA Designator changed to AJ | WAN | AVCODES |
| 2 | NIG | Aero Contractors Company of Nigeria Ltd. | IATA: AJ, Callsign: Aeroline, Name changed to Aero Contractors Nigeria Limited. IATA Designator changed from NU* | WAN | AVCODES |
| 3 | NIG | Aero Contractors Nigeria Limited | IATA: AJ, Callsign: Aeroline, IATA Prefix: 914, Name changed from Aero Contractors Company of Nigeria Ltd. IATA Designator changed from NU* | WAN | AVCODES |
| 4 | NIG | Aero Contractors Nigeria Limited | IATA: NG, Callsign: Aeroline, Ceased operations on 01 September 2016. Name changed from Aero Contractors Company of Nigeria Ltd. IATA Designator changed from NU* | WAN | AVCODES |
| 5 | NIG | Aero Contractors Company of Nigeria Ltd. | IATA: N2, Callsign: Aeroline, | WAN | AVCODES |
| 6 | NIG | Aero Contractors | IATA: AJ | | ICAO1 |
| 7 | NIGA | Niishikigawa Railway | | J | TRAFFIC |
| 8 | NIGH | NIGHTHAWK DELIVERY SYSTEMS INC | | | SCAC3 |
| 9 | NIGH | NIGHTHAWK LIMITED | | | SCAC4 |
| 10 | NIGT | NIGHT TRUCKING LTD | | | SCAC3 |
| 11 | NIGX | North American Car Corp. | added 10/1961; 7/1965-1/1975; eliminated 10/1979 | | NAKINA |
| 12 | NIGX | North American Car Corp. | 7/65-1/75 | | NRHS |
| 13 | NIGX | NORTH AMERICAN CAR CORP. | | | PWRC |
