| 2701 | KKTG | K & K TRUCKING INC | | | SCAC3 |
| 2702 | KKTH | K & K TRUCKING | | | SCAC3 |
| 2703 | KKTI | KEL-KOR TRUCKING | | | SCAC3 |
| 2704 | KKTI | K & K TRUCKING INC | | | SCAC4 |
| 2705 | KKTK | KARPINSKI TRUCKING | | | SCAC4 |
| 2706 | KKTL | K & K TRUCKING & LEASING INC | | | SCAC3 |
| 2707 | KKTL | K & K TRUCKING INC | | | SCAC4 |
| 2708 | KKTM | KATZER, KENNEY TRUCKING INC | | | SCAC4 |
| 2709 | KKTN | K & K TRANSPORTATION CO | | | SCAC3 |
| 2710 | KKTP | K-K TRANSPORT | | | SCAC3 |
| 2711 | KKTP | K-K TRANSPORT | | | SCAC4 |
| 2712 | KKTQ | K & K TRANSPORTATIONS CORP | | | SCAC4 |
| 2713 | KKTR | K & K TRUCKING | | | PWRC |
| 2714 | KKTR | K & K TRANSPORT INC | | | SCAC4 |
| 2715 | KKTU | KAWASAKI KISEN KAISHA LTD - K LINE | | J | BIC |
| 2716 | KKTU | KERR STEAMSHIP, K-LINE | | | PWRC |
| 2717 | KKTU | Kerr Steamship K Line | | | RSRV |
| 2718 | KKTU | KAWASAKI KISEN KAISHA LTD | | | SCAC4 |
| 2719 | KKTV | K & K TRUCKING INC | | | SCAC3 |
| 2720 | KKTW | KODIAK TRANSPORT | | | SCAC4 |
| 2721 | KKTY | KRIS KAY | | | SCAC4 |
| 2722 | KKU | Akku Air, Air Company LLC | Callsign: Tengiz, | KZ | AVCODES |
| 2723 | KKWA | K & K WAREHOUSING INC | | | SCAC3 |
| 2724 | KKWA | K & K WAREHOUSING INC | | | SCAC4 |
| 2725 | KKWI | KKW LOGISTICS INC | | | SCAC4 |
| 2726 | KKWL | K K WAY LTD | | | SCAC4 |
| 2727 | KKWQ | K K W TRUCKING INC | | | SCAC3 |
| 2728 | KKWQ | K K W TRUCKING INC | | | SCAC4 |
| 2729 | KKWT | KAKAW TRUCKING | | | SCAC4 |
| 2730 | KKWU | WEST OCEAN SHIPPING COMPANY LIMITED | | HK | BIC |
| 2731 | KKX | Red 73 Creamery, Inc. (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 2732 | KKXI | K&K DISTRIBUTION SERVICES, INC. | | | SCAC3 |
| 2733 | KKXI | K & K EXPRESS LLC | | | SCAC4 |
| 2734 | KKXT | KIKI TRANSPORT | | | SCAC4 |
| 2735 | KKZ | Kombinat Koksochemiczny \"Zabrze\"S.A | | PL | VKM |
| 2736 | KL | KLM Royal Dutch Airlines (Koninklijke Luchtvaart Maatschappij N.V.) | ICAO: KLM, Callsign: KLM, IATA Prefix: 074, | NL | AVCODES |
| 2737 | KL | other city transport | City: Kuala Lumpur | MAL | TRAFFIC |
| 2738 | KLA | Air Lithuania | IATA: TT, Callsign: Kaunas, IATA Prefix: 843, | LT | AVCODES |
| 2739 | KLA | SKA SA Aircraft Leasing (Pty) Ltd | | ZA | AVCODES |
| 2740 | KLA | Air Lithuania | IATA: TT | | ICAO1 |
| 2741 | KLA | Koniklije Landmacht | | NL | TRAFFIC |
| 2742 | KLAB | KOLA BUILDING MOVERS LTD | | | SCAC4 |
| 2743 | KLAC | KLASSIC EXPRESS INC | | | SCAC4 |
| 2744 | KLAE | K-LINE AMERICA | | | SCAC3 |
| 2745 | KLAF | KLEINS MOVING & STORAGE INC | | | SCAC3 |
| 2746 | KLAF | KLEINS MOVING & STORAGE INC | | | SCAC4 |
| 2747 | KLAI | KEONI LINES LLC | | | SCAC4 |
| 2748 | KLAL | K & L AUTOMOTIVE | | | SCAC4 |
| 2749 | KLAM | KLAMATH MOVING & STORAGE CO | | | SCAC3 |
| 2750 | KLAM | KLAMATH MOVING & STORAGE COMPANY IN | | | SCAC4 |
| 2751 | KLAP | KLAPEC EXPRESS INC | | | SCAC4 |
| 2752 | KLAP | UAB Klaipedos autobusu parkas | City: Klaipeda | LT | TRAFFIC |
| 2753 | KLAQ | KNOWLEDGESURGE LEARNING SOLUTIONS I | | | SCAC4 |
| 2754 | KLAR | K LINE AIR SERVICE (USA) INC | | | SCAC3 |
| 2755 | KLASR | UAB Autoklasrida | | LT | TRAFFIC |
| 2756 | KLAU | MINISTERIE VAN DEFENSIE | | NL | BIC |
| 2757 | KLAX | H. Earl Clack Co. | 7/1930-7/1954; eliminated 10/1955 | | NAKINA |
| 2758 | KLAX | H. Earl Clack Co. | 4/38-1/52 | | NRHS |
| 2759 | KLAX | H. EARL CLACK CO. | | | PWRC |
| 2760 | KLB | Air Mali International | IATA: XG, Callsign: Trans Mali, | RMM | AVCODES |
| 2761 | KLB | Air Mali International | | | ICAO1 |
| 2762 | KLB | Kriens-Luzern-Bahn | | CH | TRAFFIC |
| 2763 | KLBB | KELLYS, BOB TOWING & RECOVERY SERVI | | | SCAC3 |
| 2764 | KLBD | KALB, DAVID | | | SCAC3 |
| 2765 | KLBD | KLASSENS, JAKE KITCHEN GALLERY | | | SCAC4 |
| 2766 | KLBM | KM LOGISTICS LLC | | | SCAC4 |
| 2767 | KLBN | KLEMME, F E | | | SCAC4 |
| 2768 | KLBP | KIOLBASSA PROVISION COMPANY INC | | | SCAC4 |
| 2769 | KLBR | K & L BROKERS INC | | | SCAC3 |
| 2770 | KLBW | KLAMATH BASIN WAREHOUSE | | | SCAC3 |
| 2771 | KLC | KLM Cityhopper B.V. (KLM Commuter) | IATA: WA, Callsign: City, IATA designator changed from HN / ICAO desigantor changed from NLM | NL | AVCODES |
| 2772 | KLC | KLM Cityhopper | IATA: WA, Callsign: City, Name changed from KLM Cityhopper B.V. (KLM Commuter). IATA designator changed from HN / ICAO desigantor changed from NLM | NL | AVCODES |
| 2773 | KLC | KLM Cityhopper | IATA: WA | | ICAO1 |
| 2774 | KLC | KLM Cityhopper | | NL | TRAFFIC |
| 2775 | KLCA | KLC TRANSPORTATION INC | | | SCAC4 |
| 2776 | KLCB | KLC BROKERAGE INCORPORATED | | | SCAC4 |
| 2777 | KLCC | K LOGISTICS CORP | | | SCAC4 |
| 2778 | KLCD | KALESNIKOFF LUMBER CO LTD | | | SCAC4 |
| 2779 | KLCE | KARIDAN LOGISTICS COMPANY LLC | | | SCAC4 |
| 2780 | KLCG | KELLI-CHRISTOPHER TRUCKING INC | | | SCAC4 |
| 2781 | KLCJ | KERYX LOGISTIX CORP | | | SCAC4 |
| 2782 | KLCK | KLICKMAN, JAMES INC | | | SCAC4 |
| 2783 | KLCL | KLCS LOGISTICS INC | | | SCAC4 |
| 2784 | KLCN | KERKSIEK, LOREN C TRUCKING | | | SCAC4 |
| 2785 | KLCO | KELCO TRANSPORTATION SERVICES INC | | | SCAC4 |
| 2786 | KLCP | KOREA LINE CORPORATION | | | SCAC3 |
| 2787 | KLCP | KOREA LINE CORPORATION | | | SCAC4 |
| 2788 | KLCQ | KILCOYNE TRUCKING CO INC | | | SCAC3 |
| 2789 | KLCQ | K & L TRUCKING INC | | | SCAC4 |
| 2790 | KLCR | KELCOR TRUCKING INC | | | SCAC3 |
| 2791 | KLCR | KELCOR TRUCKING INC | | | SCAC4 |
| 2792 | KLCS | KLCS INC | | | SCAC4 |
| 2793 | KLCU | CMA-CGM | | F | BIC |
| 2794 | KLCU | IBJ LEASING COMPANY LIMITED | | | PWRC |
| 2795 | KLCU | IBJ Leasing (Containerships Ltd) | | | RSRV |
| 2796 | KLCU | ARIYUS IR PARTNERIAI T/A KURSIU LIN | | | SCAC4 |
| 2797 | KLCV | KAYLA LOGISTICS CORP | | | SCAC4 |
| 2798 | KLCY | KENNEBEC LUMBER COMPANY | | | SCAC4 |
| 2799 | KLD | Air Klaipeda | Callsign: Air Klaopeda, | LT | AVCODES |
| 2800 | KLD | Air Klaipeda | | | ICAO1 |
