| 1 | IRL | Irish Air Corps | Callsign: Irish, | IRL | AVCODES |
| 2 | IRL | Irish Air Corps | | | ICAO1 |
| 3 | IRLL | INNOVATIVE RESOURCES LLC | | | SCAC4 |
| 4 | IRLO | IRIE LOGISTICS LLC | | | SCAC4 |
| 5 | IRLQ | IRL | | | SCAC4 |
| 6 | IRLS | INTERIOR LOGISTICS SERVICES LTD | | | SCAC4 |
| 7 | IRLX | Western Railway Supply, Inc. | 7/2005 (not listed) | | NAKINA |
| 8 | IRLX | WESTERN RAILROAD SUPPLY, INC. | | | PWRC |
| 9 | IRLX | Western Railroad Supply | | | RSRV |
