| 6301 | AIH | Air Incheon Co., Ltd. | IATA: KJ, Callsign: Air Incheon, | ROK | AVCODES |
| 6302 | AIH | Alpine Air Chile | | | ICAO1 |
| 6303 | AIH | Air Incheon | | ROK | TRAFFIC |
| 6304 | AIHE | ALLIANCE SHIPPING LONDON | | | SCAC4 |
| 6305 | AIHF | A C E INTERNATIONAL FORWARDERS | | | SCAC3 |
| 6306 | AIHI | AIR HAWAII | | | SCAC4 |
| 6307 | AIHL | AMERICA LTD INC | | | SCAC3 |
| 6308 | AIHN | ALPHA INTL L P | | | SCAC4 |
| 6309 | AIHP | ASTRAL INTERNATIONAL SHIPPING SERVI | | | SCAC3 |
| 6310 | AIHT | AIR CONTAINER TRANSPORT INC | | | SCAC3 |
| 6311 | AIHT | AIR CONTAINER TRANSPORT INC | | | SCAC4 |
| 6312 | AII | Air Integra | Callsign: Integra, | CDN | AVCODES |
| 6313 | AII | Air Integra | | | ICAO1 |
| 6314 | AIIA | AMERICAN SPIRIT TRANSPORT INC | | | SCAC4 |
| 6315 | AIIB | AMERIJET INTERNATIONAL INC | | | SCAC4 |
| 6316 | AIIC | AGILITY INTERNATIONAL INC | | | SCAC4 |
| 6317 | AIIE | AMERICAS CARRIERS INC | | | SCAC3 |
| 6318 | AIIF | ALL AMERICAN AIR FREIGHT INC | | | SCAC3 |
| 6319 | AIIF | AGILITY INTERNATIONAL INC | | | SCAC4 |
| 6320 | AIIH | AIT FREIGHT SYSTEMS INC | | | SCAC3 |
| 6321 | AIIH | AIT WORLDWIDE LOGISTICS INC | | | SCAC4 |
| 6322 | AIII | AIR INTERMODEL INC | | | SCAC3 |
| 6323 | AIIL | ARMSTRONG INTERNATIONAL INC | | | SCAC3 |
| 6324 | AIIM | ACT II TRANSPORTATION | | | SCAC4 |
| 6325 | AIIN | ALSTOR INTERNATIONAL INC | | | SCAC4 |
| 6326 | AIIO | AL'S INTERNATIONAL CARTAGE, INC | | | SCAC3 |
| 6327 | AIIP | ALLTRANSPO INTERNATIONAL INC | | | SCAC3 |
| 6328 | AIIS | AIR INDUSTRIES | | | SCAC3 |
| 6329 | AIIT | ASTRO INTERNATIONAL TRANSPORT INC | | | SCAC3 |
| 6330 | AIIU | AFRAM LINES INTERNATIONAL | | | SCAC3 |
| 6331 | AIIV | ABLE INTERMODAL INC | | | SCAC4 |
| 6332 | AIIX | Adams Industries, Inc. | added 10/1969; 4/1970-1/1975; eliminated 10/1978 | | NAKINA |
| 6333 | AIIX | Adams Industries, Inc. | added 10/69; 4/70-1/75; eliminated 10/78 | | NRHS |
| 6334 | AIIX | ADAMS INDUSTRIES, INC. | | | PWRC |
| 6335 | AIIZ | III Transportation | | | RSRV |
| 6336 | AIIZ | III TRANSPORTATION | | | SCAC4 |
| 6337 | AIJ | Air Jet | IATA: V6, Callsign: Air Jet, Ceased operations on 17 March 2003. | F | AVCODES |
| 6338 | AIJ | Air Jet | IATA: BC, Callsign: Air Jet, Designator BC recalled by IATA | F | AVCODES |
| 6339 | AIJ | Air Jet | IATA: YH, Callsign: Air Jet, Designator YH recalled by IATA | F | AVCODES |
| 6340 | AIJ | Air Jet | IATA: FE, Callsign: Air Jet, Designator FE recalled by IATA | F | AVCODES |
| 6341 | AIJ | ABC Aerolineas, S.A. de C.V. | IATA: 4O, Callsign: ABC Aerolineas, IATA Prefix: 837, Ceased operations on 11 December 2020. Designator 4O* reinstated by IATA | MEX | AVCODES |
| 6342 | AIJ | ABC Aerolineas | | | ICAO1 |
| 6343 | AIK | African Airlines International Limited | Callsign: African Airlines, | EAK | AVCODES |
| 6344 | AIK | African Airlines International Limited | | | ICAO1 |
| 6345 | AIKAN | Aichi Loop Railway (Aikan) | | J | TRAFFIC |
| 6346 | AIKG | AMERICAN INTERNATIONAL TRUCKING COM | | | SCAC3 |
| 6347 | AIKI | AIRESMAN TRUCKING | | | SCAC3 |
| 6348 | AIKN | AIKIN TRANSFER | | | SCAC3 |
| 6349 | AIKR | Aiken Railway | | USA | TRAFFIC |
| 6350 | AIKT | AMICK TRUCKING | | | SCAC3 |
| 6351 | AIKU | AIR LIQUIDE INDONESIA | | | SCAC4 |
| 6352 | AIL | Air Illinois, Inc. | Callsign: Air Illinois, | USA | AVCODES |
| 6353 | AIL | Air Illinois | | | ICAO1 |
| 6354 | AILB | AIRLIMO | | | SCAC3 |
| 6355 | AILB | ACRYLIQUE LE-BO INC | | | SCAC4 |
| 6356 | AILC | ATLANTIC INLAND CARRIERS INC | | | SCAC3 |
| 6357 | AILC | AMALIE OIL COMPANY | | | SCAC4 |
| 6358 | AILD | AIR LAND EXPEDITING CO INC | | | SCAC3 |
| 6359 | AILD | AMI INTERNATIONAL LTD | | | SCAC4 |
| 6360 | AILE | AIRPORT LIMO EXPRESS | | | SCAC3 |
| 6361 | AILE | ATX INTERMODAL LLC | | | SCAC4 |
| 6362 | AILF | AIRLINE FREIGHT | | | SCAC3 |
| 6363 | AILI | AIR-LAND DELIVERY INC | | | SCAC3 |
| 6364 | AILJ | AIRPORT LIMOUSINE EXPRESS INC | | | SCAC3 |
| 6365 | AILL | ANTILLES LLOYD LTD. | | | SCAC3 |
| 6366 | AILN | ACCESS INTERNATIONAL | | | SCAC3 |
| 6367 | AILN | AMERICAN INTERNATIONAL LOGISTICS IN | | | SCAC4 |
| 6368 | AILO | ARROW-ILLINOIS COMPANY | | | SCAC3 |
| 6369 | AILO | ARROW ILLINOIS COMPANY | | | SCAC4 |
| 6370 | AILP | ASPAC INTERNATIONAL INC | | | SCAC4 |
| 6371 | AILQ | AIM LEASING COMPANY | | | SCAC3 |
| 6372 | AILQ | ACE-ICS LOGISTICS INC | | | SCAC4 |
| 6373 | AILR | ALLIANCE LOGISTIC CORP | | | SCAC3 |
| 6374 | AILT | AIR LAND TRANSPORT INC | | | SCAC4 |
| 6375 | AILU | ARMITA INDIA SHIPPING PVT LTD | | IND | BIC |
| 6376 | AILU | ASSOCIATED INT'L (LIBERIA) INC. | | | SCAC3 |
| 6377 | AILV | ARTISAN IMPORTS LTD | | | SCAC3 |
| 6378 | AILV | ALGOMA INDUSTRIAL LTD | | | SCAC4 |
| 6379 | AILW | AMERICAN INDEPENDENT LINE | | | SCAC3 |
| 6380 | AILW | AMERICAN INDEPENDENT LINE INC | | | SCAC4 |
| 6381 | AIM | Aviones Y Helicopteros Illes Balears, S.A. | Callsign: Avicoba, | E | AVCODES |
| 6382 | AIM | Ambulancias Insulares, S.A. | Callsign: Ambul-Insu, | E | AVCODES |
| 6383 | AIM | Trabajos Aereos Murcianos, S.L. | Callsign: Pijo, | E | AVCODES |
| 6384 | AIM | Trabajos Aereos Murcianos | | | ICAO1 |
| 6385 | AIMA | ALVAREZ INCLAN, MARIA ANTONIETA | | | SCAC4 |
| 6386 | AIMB | AIRMATE CO INC | | | SCAC3 |
| 6387 | AIMC | AIMCO INC | | | SCAC4 |
| 6388 | AIME | AMERICAN MATERIALS INC | | | SCAC3 |
| 6389 | AIME | AMERICAN IRON & METAL CO INC | | | SCAC4 |
| 6390 | AIMF | ALLIED INTERMODAL FORWARDING INC | | | SCAC3 |
| 6391 | AIMG | ACTION MOVING & STORAGE CO | | | SCAC3 |
| 6392 | AIMG | ART IMAGE PUBLICATIONS | | | SCAC4 |
| 6393 | AIMH | ALTA INTERNATIONAL MOVERS INC | | | SCAC3 |
| 6394 | AIMI | AIM CARTAGE & LEASING INC | | | SCAC3 |
| 6395 | AIMJ | AIR METRO LIMOUSINE INC | | | SCAC3 |
| 6396 | AIMK | ALLSTATE INTERNATIONAL MOVERS INC | | | SCAC3 |
| 6397 | AIMM | AMERICAN INTERNATIONAL MOVERS INC | | | SCAC3 |
| 6398 | AIMM | AMERICAN INTERNATIONAL MOVERS INC | | | SCAC4 |
| 6399 | AIMN | AIM TRANSPORTATION, INC | | | SCAC3 |
| 6400 | AIMN | AIM TRANSPORTATION INC | | | SCAC4 |
