| 1 | LOK | Alok Air Co. | Callsign: Alok Air, | SUD | AVCODES |
| 2 | LOK | Alok Air | | | ICAO1 |
| 3 | LOKA | LOKUTA, E J INC | | | SCAC3 |
| 4 | LOKA | LOKUTA, E J INC | | | SCAC4 |
| 5 | LOKB | LOOKINGBILL TRANSIT INC | | | SCAC3 |
| 6 | LOKC | LOK TRUCKING COMPANY | | | SCAC3 |
| 7 | LOKE | LOCKE TRANSPORTATION INC | | | SCAC4 |
| 8 | LOKI | LOCK CITY TRUCKING, INC | | | SCAC3 |
| 9 | LOKN | LANCO TRUCKING INC | | | SCAC4 |
| 10 | LOKO | Lokomotion Gesellschaft für Schienentraktion GmbH | Real: LM | D | TRAFFIC |
| 11 | LOKO | Loko Trans BG OOD / Локо Транс БГ ООД | | BG | VKM |
| 12 | LOKOOP | Lookup AG | Die Lokoop AG (LAG) war ein von der Schweizerischen Südostbahn (SOB), der Mittelthurgaubahn (MThB) und dem Reisebüro Mittelthurgau (RMT) gegründetes Unternehmen zur Vermietung von Lokomotiven | CH | TRAFFIC |
| 13 | LOKP | LOCKPORT TRUCKING COMPANY INC | | | SCAC3 |
| 14 | LOKP | LO-KEY EXPRESS | | | SCAC4 |
| 15 | LOKQ | LOGIKOR INC | | | SCAC4 |
| 16 | LOKR | LOOK, RALPH | | | SCAC3 |
| 17 | LOKS | LARSONS OF KANSAS INC | | | SCAC4 |
| 18 | LOKSK | LOK RAIL s.r.o. | | SK | VKM |
| 19 | LOKT | LOCKHART TRUCKING | | | SCAC3 |
| 20 | LOKW | LOWARY, KIM W | | | SCAC3 |
