| 1 | AZA | Alitalia-Compagnia Aerea Italiana S.p.A. | IATA: AZ, Callsign: Alitalia, IATA Prefix: 055, Name changed to Alitalia Societa Aerea Italiana S.p.A. w.e.f. 13 January 2009 assets transferred from old airline Alitalia - Linee Aeree Italiane | I | AVCODES |
| 2 | AZA | Alitalia Societa Aerea Italiana S.p.A. | IATA: AZ, Callsign: Alitalia, IATA Prefix: 055, Name changed from Alitalia-Compagnia Aerea Italiana S.p.A. w.e.f. 13 January 2009 assets transferred from old airline Alitalia - Linee Aeree Italiane | I | AVCODES |
| 3 | AZA | Alitalia | IATA: AZ | | ICAO1 |
| 4 | AZAC | AZAZ CORP | | | SCAC4 |
| 5 | AZAFT | Asociación Zaragozana de Amigos del Ferrocarril y Tranvías | | E | TRAFFIC |
| 6 | AZAL | Azerbaijan Airlines | Real: AHY | AZ | TRAFFIC |
| 7 | AZAO | A-Z AUTO | | | SCAC4 |
| 8 | AZAP | AZAP MOTORS INC | | | SCAC4 |
| 9 | AZAR | AZUARA AZUARA, AMADO F | | | SCAC4 |
