| 1 | LXO | Luxor Air | | ET | AVCODES |
| 2 | LXO | Luxor Air | | | ICAO1 |
| 3 | LXOH | Knoxville & Holston River R.R. Co., Inc. | added 10/2003; 7/2005 | | NAKINA |
| 4 | LXOH | Lexington & Ohio R.R. Co., Inc. | 7/2000; eliminated 10/2003 | | NAKINA |
| 5 | LXOH | Lexington & Ohio R.R. Co., Inc. | Jul-00 | | NRHS |
| 6 | LXOH | KNOXVILLE & HOLSTON RIVER RAILROAD CO. [LEXINGTON & OHIO RAILROAD CO.] | | | PWRC |
| 7 | LXOH | Lexington and Ohio Railroad | | | RSRV |
| 8 | LXON | LEXON TRANSPORT INC | | | SCAC4 |
