| 1 | AZX | Air Bristol Ltd. | IATA: 7L, Callsign: Aztec Air, Name changed to AB Airlines. Commenced operations during October 1993. | GB | AVCODES |
| 2 | AZX | AB Airlines Ltd. | IATA: 7L, Callsign: Aztec Air, Ceased operations during November 1999. Name changed from Air Bristol Ltd. | GB | AVCODES |
| 3 | AZX | Air Max Africa | | | ICAO1 |
| 4 | AZX | American Zinc Co. of Illinois | 8/1920-7/1936; 7/1937-4/1938 (not listed); 1/1943-1/1950 (not listed); 1/1952-10/1957; eliminated 7/1959 | | NAKINA |
| 5 | AZX | American Zinc Co. of Illinois | 1/52-10/57; eliminated 7/59 | | NRHS |
| 6 | AZX | AMERICAN ZINC OF ILLINOIS | | | PWRC |
| 7 | AZXA | AZ EXPRESS AUTO TRANSPORTATION LLC | | | SCAC4 |
| 8 | AZXC | ARRIAZA TRANSPORTATION CORP | | | SCAC4 |
| 9 | AZXD | AZAD TRANSPORT LTD | | | SCAC4 |
| 10 | AZXE | ARIZONA EXPRESS INC | | | SCAC3 |
| 11 | AZXI | AZTEC EXPRESS INC | | | SCAC4 |
| 12 | AZXJ | AZERE TRANSPORT LLC | | | SCAC4 |
| 13 | AZXL | AZ TRANSPORT LLC | | | SCAC4 |
| 14 | AZXP | A-Z EXPRESS | | | SCAC3 |
| 15 | AZXS | ARIZONA TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 16 | AZXT | A TO Z TRANSPORT | | | SCAC4 |
| 17 | AZXU | AMAZON WEB SERVICES | | USA | BIC |
| 18 | AZXX | Arizona Chemical Co. | added 4/2003; eliminated 1/2004; added 4/2004; 7/2005 | | NAKINA |
| 19 | AZXX | ARIZONA CHEMICAL COMPANY | | | PWRC |
| 20 | AZXX | Arizona Chemical | | | RSRV |
| 21 | AZXX | ARIZONA CHEMICAL CO | | | SCAC4 |
