| 1 | IMP | Imperial Air | | PE | AVCODES |
| 2 | IMP | Hellenic Imperial Airways | IATA: HT, Callsign: Imperial, IATA Prefix: 570, Founded in May 2006. Ceased operations in 2012. | GR | AVCODES |
| 3 | IMPC | IMPACT TRANSPORTATION LLC | | | SCAC4 |
| 4 | IMPD | IMPEL TRANSPORT LTD | | | SCAC4 |
| 5 | IMPG | IMPERIAL EAGLE EXPRESS INC | | | SCAC4 |
| 6 | IMPI | IMPERIAL INTER FREIGHT INC | | | SCAC4 |
| 7 | IMPK | IMPERIAL - DE GRAVE BV | | | SCAC4 |
| 8 | IMPN | IMPRITECH INC | | | SCAC4 |
| 9 | IMPQ | IMP GROUP LIMITED | | | SCAC4 |
| 10 | IMPR | Imperial | City: Romford | GB | TRAFFIC |
| 11 | IMPS | IMPERIAL SHIPPING LTD | | | SCAC4 |
| 12 | IMPU | IMPERIAL CHEMICAL TRANSPORT GMBH | | D | BIC |
| 13 | IMPY | INTERCARGO LOGISTICS INC | | | SCAC4 |
| 14 | IMPZ | IMPERIAL INC. | | | PWRC |
