| 1 | KOR | Air Koryo | IATA: JS, Callsign: Air Koryo, IATA Prefix: 120, Name changed from Chosonmihang CAA of DPR of Korea | PRK | AVCODES |
| 2 | KOR | Körös Volán | | H | TRAFFIC |
| 3 | KORA | KOREAN AIRLINES | | | SCAC4 |
| 4 | KORB | KORESELMAN BROS INC | | | SCAC3 |
| 5 | KORB | KORSMO BROTHERS TRUCKING | | | SCAC4 |
| 6 | KORE | KOCH, RALPH E | | | SCAC3 |
| 7 | KORF | KOHL, ROBERT F INC | | | SCAC3 |
| 8 | KORI | KORAH TRUCKING | | | SCAC4 |
| 9 | KORM | KORMAN TRADING INTERNATIONAL | | | SCAC3 |
| 10 | KORO | KORONI SHIPPING COMPANY LTD | | | SCAC3 |
| 11 | KORO | Transport Osobowy "Koro" Jerzy Konsowicz, Dariusz Rogut, s.c. | City: Zgierz | PL | TRAFFIC |
| 12 | KORQ | KOREA INTERMODAL TRANSPORT CO LTD. | | | SCAC3 |
| 13 | KORS | KORSON, M & CO, INC | | | SCAC3 |
| 14 | KORT | KORTSCH, MICHAEL J MOVING & STORAGE | | | SCAC3 |
| 15 | KORU | CUBEX LTD | | NZ | BIC |
| 16 | KORX | The Kansas Oil Refining Co. | 8/1920-7/1923 | | NAKINA |
| 17 | KORX | KANSAS OIL REFINING CO. | | | PWRC |
