| 2901 | KLKS | KTL INC | | | SCAC3 |
| 2902 | KLKT | KLINK TRUCKING INC | | | SCAC3 |
| 2903 | KLKU | CONTAINER LEASING COMPANY | | RUS | BIC |
| 2904 | KLKU | CONTAINER LEASING COMPANY LTD | | | SCAC4 |
| 2905 | KLKW | KLENKE, WILBUR C | | | SCAC3 |
| 2906 | KLL | Klickitat Log and Lumber (St. Regis Paper Co.) | | | RSRV |
| 2907 | KLLC | KELTRANS LLC | | | SCAC4 |
| 2908 | KLLD | KELLYS DELIVERY SERVICE | | | SCAC3 |
| 2909 | KLLF | KELLY FARMS | | | SCAC3 |
| 2910 | KLLF | K & L LOGISTICS INC | | | SCAC4 |
| 2911 | KLLG | KNITNEY LINES LOGISTICS INC | | | SCAC4 |
| 2912 | KLLH | KLM LOGISTICS LLC | | | SCAC4 |
| 2913 | KLLI | KELLY INC | | | SCAC3 |
| 2914 | KLLJ | KELLY, JAMES | | | SCAC4 |
| 2915 | KLLL | KLENSKE, L L LOGISTICS | | | SCAC4 |
| 2916 | KLLM | KENT LINE LIMITED | | | SCAC3 |
| 2917 | KLLM | KENT LINE LIMITED | | | SCAC4 |
| 2918 | KLLN | KELLNERS FIREWORKS INC | | | SCAC4 |
| 2919 | KLLP | KELLEY, PAUL | | | SCAC3 |
| 2920 | KLLP | KL LOGISTIC CORPORATION | | | SCAC4 |
| 2921 | KLLQ | KELLER, JOHN F | | | SCAC3 |
| 2922 | KLLR | KELLER TRANSPORT, INC. | | | SCAC3 |
| 2923 | KLLS | KALLISHIP CO LTD | | | SCAC4 |
| 2924 | KLLT | KLLM TRANSPORT SERVICES LLC | | | SCAC4 |
| 2925 | KLLV | KNOLLMAN, ELVIN L INC | | | SCAC3 |
| 2926 | KLLW | KHA LOGISTICS LLC | | | SCAC4 |
| 2927 | KLLX | TUCO, Inc. | eliminated 1/2004 | | NAKINA |
| 2928 | KLLX | TUCO Inc. | 7/2005 (not listed) | | NAKINA |
| 2929 | KLLX | TUCO, INC. | | | PWRC |
| 2930 | KLLX | TUCO INC | | | SCAC4 |
| 2931 | KLLY | KELLEY, GRAFTON | | | SCAC3 |
| 2932 | KLLY | KELLYCO | | | SCAC4 |
| 2933 | KLLZ | KONE LANDELL LEAD | | | PWRC |
| 2934 | KLM | KLM Royal Dutch Airlines (Koninklijke Luchtvaart Maatschappij N.V.) | IATA: KL, Callsign: KLM, IATA Prefix: 074, | NL | AVCODES |
| 2935 | KLM | KLM Royal Dutch Airlines | IATA: KL | | ICAO1 |
| 2936 | KLM | KLM | | NL | TRAFFIC |
| 2937 | KLMA | KALLISTI MARITIME SA LIBERIA | | | SCAC4 |
| 2938 | KLMB | KALLMEYER BROS | | | SCAC3 |
| 2939 | KLMB | KALLMEYER BROS ENTERPRISES INC | | | SCAC4 |
| 2940 | KLMC | K L M TRUCKING CO | | | SCAC3 |
| 2941 | KLME | KALITERI MARITIME SA LIBERIA | | | SCAC4 |
| 2942 | KLMF | KAOLIN MUSHROOM FARMS INC | | | SCAC3 |
| 2943 | KLMF | KAOLIN MUSHROOM FARMS INC | | | SCAC4 |
| 2944 | KLMG | KLIME TRUCKING | | | SCAC4 |
| 2945 | KLMI | KLLM INC | | | SCAC3 |
| 2946 | KLMI | KLLM TRANSPORT SERVICES LLC | | | SCAC4 |
| 2947 | KLMK | KENTUCKY LAKE MOVING & STORAGE LLC | | | SCAC4 |
| 2948 | KLML | KLIMEK, LARRY TRUCKING INC | | | SCAC4 |
| 2949 | KLMM | KLEMME TRUCKING INC | | | SCAC3 |
| 2950 | KLMM | KLIMER MANUFACTURING INC | | | SCAC4 |
| 2951 | KLMN | KLM TRANSPORTATION INC | | | SCAC3 |
| 2952 | KLMP | KLLM TRANSPORT SERVICES LLC (MIS DI | | | SCAC4 |
| 2953 | KLMQ | KILMER, RICHARD A | | | SCAC3 |
| 2954 | KLMR | KALMER, JOHN F TRUCKING | | | SCAC3 |
| 2955 | KLMS | KOLDON MOVING AND STORAGE INC | | | SCAC3 |
| 2956 | KLMS | KOLDON MOVING AND STORAGE | | | SCAC4 |
| 2957 | KLMV | KLLM TRANSPORT SERVICES LLC (INTERM | | | SCAC4 |
| 2958 | KLN | Kaliningrad Air Enterprise | Callsign: Kaliningrad Air, | RUS | AVCODES |
| 2959 | KLNA | K-LINE TRANSIT | | | SCAC3 |
| 2960 | KLNA | K-LINE TRANSPORTATION INC | | | SCAC4 |
| 2961 | KLNC | K-LINE INC | | | SCAC3 |
| 2962 | KLNC | KLASSEN CONSTRUCTION | | | SCAC4 |
| 2963 | KLND | KLN STEEL PRODUCTS COMPANY | | | SCAC3 |
| 2964 | KLNE | KLINE, H. O | | | SCAC3 |
| 2965 | KLNG | KLINGSHIRN & SONS TRUCKING INC | | | SCAC4 |
| 2966 | KLNI | K LINES INC | | | SCAC3 |
| 2967 | KLNI | K LINES INC | | | SCAC4 |
| 2968 | KLNK | KLINK, FAY V AND BARBARA L KLINK | | | SCAC3 |
| 2969 | KLNL | KLEINS LOGGING INC | | | SCAC3 |
| 2970 | KLNL | KLN CONTAINER LINE LIMITED | | | SCAC4 |
| 2971 | KLNM | KILIAN MANUFACTURING CORPORATION | | | SCAC4 |
| 2972 | KLNP | KELLEY, NIP EQUIPMENT CO INC | | | SCAC3 |
| 2973 | KLNQ | KILIAN CORPORATION, THE | | | SCAC3 |
| 2974 | KLNR | KELTNER, RUSSELL | | | SCAC3 |
| 2975 | KLNR | K LINE TRANSPORTATION INC (REFRIGER | | | SCAC4 |
| 2976 | KLNS | K LINE LNG SHIPPING (UK) LTD | | | SCAC4 |
| 2977 | KLNT | KEELAN TRUCKING COMPANY | | | SCAC3 |
| 2978 | KLNT | K-LINE TRAILERS LTD | | | SCAC4 |
| 2979 | KLNU | KART (THAILAND) LIMITED | | T | BIC |
| 2980 | KLNV | KLINE, VERNON L | | | SCAC3 |
| 2981 | KLO | Flight-Ops International, Inc. t/a Skyxpress Airline | Callsign: Klondike, Ceased operations in November 2008 due to the financial crisis. | CDN | AVCODES |
| 2982 | KLO | Flight-Ops International | | | ICAO1 |
| 2983 | KLOA | KBG LOGISTICS | | | SCAC4 |
| 2984 | KLOC | KS LOGISTICS INC | | | SCAC4 |
| 2985 | KLOCK | Klöckner-Werke Bremen | | D | TRAFFIC |
| 2986 | KLOD | KLD LOGISTICS | | | SCAC4 |
| 2987 | KLOE | KELRON TRANSPORTATION MANAGEMENT IN | | | SCAC4 |
| 2988 | KLOF | KLOEPFER INC | | | SCAC3 |
| 2989 | KLOG | KOCH LOGISTICS (DIV OF STAN KOCH & | | | SCAC4 |
| 2990 | KLOI | KELLERSTRASS OIL CO | | | SCAC4 |
| 2991 | KLOJ | KENNEDY LOGISTICS OF ILLINOIS (INTE | | | SCAC4 |
| 2992 | KLOK | KLOKE MOVERS | | | SCAC4 |
| 2993 | KLOL | KLASEN OIL COMPANY INC | | | SCAC4 |
| 2994 | KLOM | KP LOGIEM | | | SCAC4 |
| 2995 | KLON | KALONIAL TRANSPORT LTD | | | SCAC4 |
| 2996 | KLOP | KELLER, L OIL PROPERTIES INC | | | SCAC3 |
| 2997 | KLOP | KLOS LOGISTICS INC | | | SCAC4 |
| 2998 | KLOQ | KINGDOM LOGISTICS | | | SCAC4 |
| 2999 | KLOR | KALCO RECOVERY INC | | | SCAC3 |
| 3000 | KLOS | KLOSE, H L & SONS INC | | | SCAC4 |
