| 1 | KAT | Kato Airline AS | IATA: 6S, Callsign: Kato-Air, Designator 6S recalled by IATA | N | AVCODES |
| 2 | KAT | Keeler Air Transport Service Ltd. | Callsign: KatNs, | GB | AVCODES |
| 3 | KAT | Aero Tak Limited | Callsign: Aero Tak, | WAN | AVCODES |
| 4 | KAT | Kato Airline | | | ICAO1 |
| 5 | KATAHI | Katahigashi port private line | City: Kuroyama, The Kuroyama station divergence new Katahigashi port private line - the Niigata seaside railroad. | J | TRAFFIC |
| 6 | KATC | KAT INC | | | SCAC3 |
| 7 | KATD | KATHYS DELIVERY INC | | | SCAC3 |
| 8 | KATE | KATO EXPRESS INC | | | SCAC3 |
| 9 | KATE | K A T EXCAVATION & CONSTRUCTION INC | | | SCAC4 |
| 10 | KATE | Kansai Airport Transportation Enterprise | | J | TRAFFIC |
| 11 | KATG | KASPER TRUCKING | | | SCAC3 |
| 12 | KATH | KATHOL, VIRGIL | | | SCAC3 |
| 13 | KATH | KATHOL, VIRGIL TRUCKING INC | | | SCAC4 |
| 14 | KATI | KATMAI OIL & GAS INC | | | SCAC3 |
| 15 | KATI | K AND T LOGISTICS GA | | | SCAC4 |
| 16 | KATK | KAISER TRUCKING INCORPORATED | | | SCAC3 |
| 17 | KATL | KAYS TRANSPORT LTD | | | SCAC3 |
| 18 | KATL | K & A TRUCKING LTD | | | SCAC4 |
| 19 | KATM | KATMAI LOGISTICS LLC | | | SCAC4 |
| 20 | KATO | K & K TRUCKING | | | SCAC3 |
| 21 | KATP | KNIGHTS AUTO TRANSPORT | | | SCAC3 |
| 22 | KATQ | KANE TRANSPORT INC | | | SCAC3 |
| 23 | KATR | K & A TRANSPORTATION INC | | | SCAC3 |
| 24 | KATS | KAFIN OIL CO INC | | | SCAC4 |
| 25 | KATT | K A T | | | SCAC3 |
| 26 | KATU | KATO AROMATIC S.A.E. | | | SCAC3 |
| 27 | KATU | KATCO JV LLP | | | SCAC4 |
| 28 | KATX | Marubeni America Corp. | added 10/1985; eliminated 10/1987 | | NAKINA |
| 29 | KATX | Marubeni America Corp. | eliminated 10/87 | | NRHS |
| 30 | KATX | MARUBENI AMERICA CORP. | | | PWRC |
| 31 | KATY | K AND T INVESTMENTS INC | | | SCAC4 |
