| 1 | LIR | Lionair, S.A. | Callsign: Lair, | L | AVCODES |
| 2 | LIR | Minsk Aircraft Overhaul Plant | Callsign: Lisline, | BY | AVCODES |
| 3 | LIR | Heli Air | | F | AVCODES |
| 4 | LIR | Minsk Aircraft Overhaul Plant | | | ICAO1 |
| 5 | LIRB | LES INSTALLATIONS RE-BAST INC | | | SCAC4 |
| 6 | LIRC | Louisville & Indiana R.R. Co. | added 7/1994; 7/2000-7/2005 | | NAKINA |
| 7 | LIRC | Louisville & Indiana R.R. Co. | added 7/94; 7/2000 | | NRHS |
| 8 | LIRC | LOUISVILLE & INDIANA RAILROAD | | | PWRC |
| 9 | LIRC | Louisville and Indiana Railroad | | | RSRV |
| 10 | LIRC | LOUISVILLE & INDIANA RAILROAD COMPA | | | SCAC4 |
| 11 | LIRC | Louisville and Indiana | | USA | TRAFFIC |
| 12 | LIRJ | LIDDY, R J TRANSPORT INC | | | SCAC3 |
| 13 | LIRJ | LES INDUSTRIES JACK | | | SCAC4 |
| 14 | LIRL | LITTLE INDIAN TRUCK LINE | | | SCAC4 |
| 15 | LIRR | Lapeer Industrial R.R. Co. | added 1/2004; eliminated 4/2004; 7/2005 | | NAKINA |
| 16 | LIRR | *LONG ISLAND RAIL ROAD | | | PWRC |
| 17 | LIRR | +LAPEER INDUSTRIAL RAILROAD CO. | | | PWRC |
| 18 | LIRR | Lapeer Industrial Railroad | | | RSRV |
| 19 | LIRR | LAPEER INDUSTRIAL RAILROAD COMPANY | | | SCAC4 |
| 20 | LIRR | Long Island Railroad | | USA | TRAFFIC |
| 21 | LIRS | LET IT RIDE CARRIERS | | | SCAC4 |
| 22 | LIRT | LIBERTY TRANSPORTATION INC | | | SCAC3 |
| 23 | LIRU | Roland Ltd. | | | RSRV |
| 24 | LIRU | ROLAND CORPORATION U.S.A. | | | SCAC3 |
| 25 | LIRU | ROLAN LTD | | | SCAC4 |
| 26 | LIRX | LAPEER INDUSTRIAL RAILROAD CO. | | | PWRC |
| 27 | LIRY | LIBERTY TRUCKING INC | | | SCAC4 |
