| 1 | INF | Inter Flight Ltd Oy | Callsign: Interfin, | FIN | AVCODES |
| 2 | INF | Infinity Aviation | Callsign: Ozone, Ceased operations. | UAE | AVCODES |
| 3 | INFE | INTERFLETES TRUCKING | | | SCAC4 |
| 4 | INFF | INTERCALIFORNIAS FORWARDING | | | SCAC4 |
| 5 | INFG | INTERNATIONAL FREIGHT SERVICES | | | SCAC4 |
| 6 | INFI | INFINITY | | | SCAC4 |
| 7 | INFK | INFINITY TRUCK LINES | | | SCAC4 |
| 8 | INFL | I N F LTD | | | SCAC4 |
| 9 | INFO | INTERCITY FREIGHT LINES | | | SCAC4 |
| 10 | INFQ | INSULFOAM | | | SCAC4 |
| 11 | INFR | Infraleuna | Real: ILIS | D | TRAFFIC |
| 12 | INFRA | infra fürth gmbh | City: Fürth | D | TRAFFIC |
| 13 | INFRA | Infranord AB | | SE | VKM |
| 14 | InfraLeuna | InfraLeuna Infrastruktur und Service GmbH | Leuna | D | privat-bahn.de |
| 15 | INFU | INNOFREIGHT SPEDITIONS GMBH | | A | BIC |
| 16 | INFV | INFINITY NAVIGATION S A | | | SCAC4 |
| 17 | INFX | Infineum USA L.P. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 18 | INFX | Infineum USA L.P. | added 1/2000; 7/2000 | | NRHS |
| 19 | INFX | INFINEUM USA, LTD. | | | PWRC |
| 20 | INFX | Infineum USA | | | RSRV |
| 21 | INFX | INFINEUM | | | SCAC4 |
| 22 | INFY | INFINITY SPORTS IMPORTS INC | | | SCAC4 |
