| 1 | HPP | Aviation Partner of Boynton Beach, LLC d/b/a Sky Atlantic US | Callsign: Sky Hop, | USA | AVCODES |
| 2 | HPPI | HARVEST PAC PRODUCTS INC | | | SCAC4 |
| 3 | HPPO | HELMS PETROLEUM | | | SCAC4 |
| 4 | HPPP | HUGHES PETROLEUM PRODUCTS INC | | | SCAC4 |
| 5 | HPPT | HAPPY TIME TOURS (THUNDER BAY) LIMI | | | SCAC4 |
| 6 | HPPU | HOA PHAT CONTAINER PRODUCTION JSC. | | VN | BIC |
| 7 | HPPX | Flint Hills Resources LP | added 1/2009 | | NAKINA |
| 8 | HPPX | Huntsman LLC | added 4/2003; 7/2005; eliminated 1/2009 | | NAKINA |
| 9 | HPPX | Huntsman Polypropylene Corp. | eliminated 4/2003 | | NAKINA |
| 10 | HPPX | Huntsman Polymers Corp. | added 7/2002 | | NAKINA |
| 11 | HPPX | Huntsman Corp. | added 4/2002 | | NAKINA |
| 12 | HPPX | Huntsman Polypropylene Corp. | added 4/1988; 1/1994-7/2000; eliminated 4/2002 | | NAKINA |
| 13 | HPPX | Huntsman Polypropylene Corp. | added 4/88; 1/94-7/2000 | | NRHS |
| 14 | HPPX | HUNTSMAN LLC (HUNTSMAN POLYPROPYLENE CORPORATION) | | | PWRC |
| 15 | HPPX | Huntsman Polypropylene Corporation | | | RSRV |
| 16 | HPPX | HUNTSMAN LLC | | | SCAC4 |
| 17 | HPPY | HAPPY TRAVELERS TOURS | | | SCAC4 |
| 18 | HPPZ | HAYWOOD POWER PLANT | | | PWRC |
