| 1 | IAP | Internacional de Aviacion, S.A. | IATA: IX, Callsign: Inair, | PA | AVCODES |
| 2 | IAPP | INDUSTRIAS APPAREL SA DE CV | | | SCAC4 |
| 3 | IAPU | HOLIDAY ON ICE PRODUCTIONS BV | | NL | BIC |
| 4 | IAPU | HOLIDAY ON ICE PRODUCTIONS BV | | | SCAC4 |
| 5 | IAPX | Air Liquide IC GP LLC d/b/a Air Liquide Industrial U.S. LP | added 7/2008 | | NAKINA |
| 6 | IAPX | Air Liquide America Corp. | added 1/1995; 7/2000-7/2005; eliminated 7/2008 | | NAKINA |
| 7 | IAPX | Liquid Air Corp. | added 1/1987; 1/1994; eliminated 1/1995 | | NAKINA |
| 8 | IAPX | Liquid Air, Inc. | added 10/1974; 1/1975-1/1980; eliminated 1/1987 | | NAKINA |
| 9 | IAPX | The Iowa Packing Co. | 7/1930 | | NAKINA |
| 10 | IAPX | Industrial Air Products Co. | added 10/1965; 10/1966-4/1970; eliminated 10/1974 | | NAKINA |
| 11 | IAPX | Industrial Air Products Co. | added 10/65; 10/66-4/70 | | NRHS |
| 12 | IAPX | Liquid Air, Inc. | 1/75-1/80; eliminated 1/87 | | NRHS |
| 13 | IAPX | Liquid Air Corp. | added 1/87; 1/94; eliminated 1/95 | | NRHS |
| 14 | IAPX | Air Liquide America Corp. | added 1/95; 7/2000 | | NRHS |
| 15 | IAPX | *IOWA PACKING CO. | | | PWRC |
| 16 | IAPX | +AIR LIQUIDE AMERICA CORP. [LIQUID AIR CORPORATION; INDUSTRIAL AIR PRODUCTS CO.] | | | PWRC |
| 17 | IAPX | Industrial Air Products (Air Liquide America Corporation) | | | RSRV |
| 18 | IAPX | AIR LIQUIDE AMERICA CORPORATION | | | SCAC4 |
