| 1 | AIN | African International Airways | IATA: WS, Callsign: Fly Cargo, IATA Prefix: 648, Founded in 1985. Ceased operations in 2008. Designator WS recalled by IATA | ZA | AVCODES |
| 2 | AIN | African International Airways | | | ICAO1 |
| 3 | AINA | AMERICAN INFRASTRUCTURE MARYLAND | | | SCAC4 |
| 4 | AINB | ATL INC | | | SCAC4 |
| 5 | AIND | AIR LAND & SEA INC | | | SCAC3 |
| 6 | AINF | AMERICAN INTERNATIONAL FORWARDERS | | | SCAC3 |
| 7 | AINF | ASL INC | | | SCAC4 |
| 8 | AING | AUTOLINEA INTERNACIONAL GARCOSS | | | SCAC4 |
| 9 | AINH | AMERICAN CLASSIC CHARTERS & TOURS I | | | SCAC3 |
| 10 | AINI | AMASH IMPORTS INC | | | SCAC3 |
| 11 | AINI | AMASH IMPORTS INC | | | SCAC4 |
| 12 | AINK | ATRANS INC | | | SCAC4 |
| 13 | AINL | ARAS INTERNATIONAL INC. | | | SCAC3 |
| 14 | AINL | ARAS INTERNATIONAL INC. | | | SCAC4 |
| 15 | AINN | ALMAS INTERNATIONAL | | | SCAC3 |
| 16 | AINN | AERONET INC | | | SCAC4 |
| 17 | AINO | Ainokaze Toyama Railway | | J | TRAFFIC |
| 18 | AINO | ARGE Istandhaltung Niederösterreich | | AT | VKM |
| 19 | AINP | ALLEN INC | | | SCAC3 |
| 20 | AINP | ATS INTERNATIONAL SERVICES INC | | | SCAC4 |
| 21 | AINQ | AINESON, DELL INC | | | SCAC3 |
| 22 | AINR | ALLIANCE AIRLINES | | | SCAC4 |
| 23 | AINT | AMANA INC | | | SCAC4 |
| 24 | AINW | AMERICANA INC | | | SCAC3 |
| 25 | AINW | AMERICYCLE INC | | | SCAC4 |
| 26 | AINX | TTX Company, Acorn Division | added 1/1992; 1/1994-7/2000; eliminated 1/2003; 7/2005 (not listed) | | NAKINA |
| 27 | AINX | Trailer Train Co., Acorn Division | 1/1985 (not listed); added 4/1985; eliminated 1/1992 | | NAKINA |
| 28 | AINX | Trailer Train Co., Acorn Division | added 4/85; eliminated 1/92 | | NRHS |
| 29 | AINX | TTX Company, Acorn Division | added 1/92; 1/94-7/2000 | | NRHS |
| 30 | AINX | TTX COMPANY - ACORN DIVISION | | | PWRC |
| 31 | AINX | TTX Corporation Acorn Division | | | RSRV |
| 32 | AINX | TTX COMPANY | | | SCAC4 |
| 33 | AINY | A & M OIL COMPANY INC | | | SCAC4 |
