| 3101 | KLTU | KAWASAKI KISEN KAISHA LTD - K LINE | | J | BIC |
| 3102 | KLTU | KAWASAKI KISEN KAISHA LTD | | | SCAC4 |
| 3103 | KLTW | K-LINE TRUCKING INC | | | SCAC3 |
| 3104 | KLTW | K-LINE TRUCKING INC | | | SCAC4 |
| 3105 | KLTY | K & L TRANSPORT INC | | | SCAC4 |
| 3106 | KLUD | KLUDT, E F & SONS INC | | | SCAC4 |
| 3107 | KLUG | KLUG-DIRECT TRANSP INC | | | PWRC |
| 3108 | KLUJ | KLUN, JACK TRUCKING INC | | | SCAC3 |
| 3109 | KLUK | KLUKWAN FOREST PRODUCTS | | | SCAC3 |
| 3110 | KLUN | KLUNSKI TRANSPORT INC | | | SCAC3 |
| 3111 | KLUP | KLUMP TRUCKING INC | | | SCAC3 |
| 3112 | KLUS | DELCON LINE (USA) INC | | | SCAC4 |
| 3113 | KLVC | KELVIN CHALLENGE LIMITED | | | SCAC3 |
| 3114 | KLVE | TORVALD KLAVENESS & COMPANY | | | SCAC3 |
| 3115 | KLVG | KLAVINGER TRANSPORTATION SYSTEM | | | SCAC3 |
| 3116 | KLVH | KLAVUHN MOVING & STORAGE CO | | | SCAC3 |
| 3117 | KLVH | KLAVUHN MOVING & STORAGE CO INC | | | SCAC4 |
| 3118 | KLVN | KELVIN ENTERPRISE LIMITED | | | SCAC3 |
| 3119 | KLVQ | KELLY, VERNON R TRUCKING | | | SCAC3 |
| 3120 | KLVT | KLOVER TRUCKING COMPANY | | | SCAC3 |
| 3121 | KLVT | KALEIDA VENTURES | | | SCAC4 |
| 3122 | KLWC | KEL-WEST CARRIERS LTD | | | SCAC3 |
| 3123 | KLWI | K L W INC | | | SCAC3 |
| 3124 | KLWI | K L OF | | | SCAC4 |
| 3125 | KLWL | KEEL, WALTER EARL | | | SCAC3 |
| 3126 | KLWL | KOWALSKY, WALTER R | | | SCAC4 |
| 3127 | KLWO | KELLEY-WILLIAMSON CO | | | SCAC4 |
| 3128 | KLWU | KLEINWAECHTER GMBH & CO KG | | | SCAC4 |
| 3129 | KLWX | KLWX, INC. | | | PWRC |
| 3130 | KLWX | KLWX INC | | | SCAC4 |
| 3131 | KLX | Kelix Air | Callsign: Kelix, | WAN | AVCODES |
| 3132 | KLX | Kelix Air | | | ICAO1 |
| 3133 | KLXB | KLAX BROKERAGE | | | SCAC3 |
| 3134 | KLXB | K & L XPRESS INC | | | SCAC4 |
| 3135 | KLXD | KELLER EXPEDITED DELIVERY LLC | | | SCAC4 |
| 3136 | KLXI | KLX INC | | | SCAC3 |
| 3137 | KLXI | KLX INC | | | SCAC4 |
| 3138 | KLXK | KLX TRUCKING | | | SCAC4 |
| 3139 | KLXL | KLX LOGISTICS LLC | | | SCAC4 |
| 3140 | KLXO | KLX LOGISTICS INC | | | SCAC4 |
| 3141 | KLXP | K-LINE XPRESS CO | | | SCAC3 |
| 3142 | KLXQ | K & L TRANSPORT INC | | | SCAC4 |
| 3143 | KLXR | K I L EXPRESS | | | SCAC3 |
| 3144 | KLXU | KLAESER INT FACHSPEDITION & FARHZEU | | | SCAC4 |
| 3145 | KLXV | KL TRANSPORT SERVICE LLC | | | SCAC4 |
| 3146 | KLY | Air Calypso | Callsign: Lypso, | F | AVCODES |
| 3147 | KLYA | KELLY ANN TRAVEL AGENCY | | | SCAC3 |
| 3148 | KLYC | KELLY COMPANY | | | SCAC3 |
| 3149 | KLYE | KEELEY RANCH | | | SCAC3 |
| 3150 | KLYE | KELLEYS FARM | | | SCAC4 |
| 3151 | KLYF | KARLEY FINANCE S A | | | SCAC4 |
| 3152 | KLYG | KELLEY, GEORGE A | | | SCAC3 |
| 3153 | KLYG | KELLEY LOGISTICS | | | SCAC4 |
| 3154 | KLYI | KELLY INTERNATIONAL | | | SCAC3 |
| 3155 | KLYI | KELLY INTERNATIONAL | | | SCAC4 |
| 3156 | KLYL | KELLY OIL | | | SCAC4 |
| 3157 | KLYM | KELLY TRANSPORTATION | | | SCAC4 |
| 3158 | KLYO | KELLEY OIL CO | | | SCAC4 |
| 3159 | KLYP | KINLEY CORPORATION | | | SCAC3 |
| 3160 | KLYQ | KELLY TRUCKING | | | SCAC3 |
| 3161 | KLYR | KELLY, RON TRUCKING | | | SCAC3 |
| 3162 | KLYU | SAMERUS REEFER CONTAINER S.A. | | MH | BIC |
| 3163 | KLZ | Aerokaluz, S.A. de C.V. | Callsign: Aerokaluz, | MEX | AVCODES |
| 3164 | KLZ | Aerokaluz | | | ICAO1 |
| 3165 | KLZ | KALISPELL LINE | | | PWRC |
| 3166 | KLZG | KLEPZIG, E R | | | SCAC3 |
| 3167 | KLZJ | KAIN, LIZ JEWELLERY | | | SCAC4 |
| 3168 | KLZL | KLOTZ LEASING INC | | | SCAC3 |
| 3169 | KM | Air Malta p.l.c. | ICAO: AMC, Callsign: Air Malta, IATA Prefix: 643, Name changed to Air Malta Co. Ltd. ICAO callsign changed to Kilo Mike | M | AVCODES |
| 3170 | KM | Air Malta co. Ltd. | ICAO: AMC, Callsign: Kilo Mike, IATA Prefix: 643, Name changed to Air Malta p.l.c. ICAO callsign changed to Air Malta | M | AVCODES |
| 3171 | KM | Kansas and Missouri Ry. and Terminal Co. | 1/1994-7/2005 | | NAKINA |
| 3172 | KM | The Kansas City Southern Ry. Co. | added 10/1984 | | NAKINA |
| 3173 | KM | The Kansas and Missouri Ry. and Terminal Co. | 1/1975-1/1980; eliminated 10/1984 | | NAKINA |
| 3174 | KM | The Kansas and Missouri Ry. and Terminal Co. | 1/75-1/80; eliminated 10/84 | | NRHS |
| 3175 | KM | The Kansas City Southern Ry. Co. | added 10/84 | | NRHS |
| 3176 | KM | Kansas and Missouri Ry. and Terminal Co. | 1/94-7/2000 | | NRHS |
| 3177 | KM | KANSAS CITY SOUTHERN RAILWAY [KANSAS & MISSOURI RY. & TERMINAL CO.] | | | PWRC |
| 3178 | KM | Kansas and Missouri Railway and Terminal | | | RSRV |
| 3179 | KM | Koleje Mazowieckie | | PL | TRAFFIC |
| 3180 | KMA | Komiaviatrans State Air Enterprise | Callsign: Komi Avia, Name changed to Komiaviatrans Open Joint sotck Company | RUS | AVCODES |
| 3181 | KMA | Komiaviatrans Open Joint Stock Company | IATA: KO, Callsign: Komi Avia, Name changed from Komiaviatrans State Air Enterprise | RUS | AVCODES |
| 3182 | KMA | Komiaviatrans State Air Enterprise | | | ICAO1 |
| 3183 | KMAA | KMA TRANSPORTATION LLC | | | SCAC4 |
| 3184 | KMAC | KMAC TRANSPORT | | | SCAC4 |
| 3185 | KMAE | KEMNA ENTERPRISES | | | SCAC3 |
| 3186 | KMAE | KEMNA ENTERPRISES | | | SCAC4 |
| 3187 | KMAF | K & M AIR FREIGHT | | | SCAC3 |
| 3188 | KMAF | KMT ENTERPRISES | | | SCAC4 |
| 3189 | KMAK | KETELSEN, MARK | | | SCAC4 |
| 3190 | KMAL | KMA LLC | | | SCAC4 |
| 3191 | KMAN | KUNTZMAN, R | | | SCAC3 |
| 3192 | KMAN | KUNTZMAN TRUCKING INC | | | SCAC4 |
| 3193 | KMAS | KELLER MOVING & STORAGE, INC | | | SCAC3 |
| 3194 | KMAS | KERO-DEL OF MARYLAND INC | | | SCAC4 |
| 3195 | KMAT | KMA TRANSPORTATION CO | | | SCAC3 |
| 3196 | KMAU | ROYAL NETHERLANDS NAVY | | NL | BIC |
| 3197 | KMAU | TRANSMO SPECIAL PRODUCTS BV | | | SCAC4 |
| 3198 | KMB | Deltaq Engineering Aviation Limited | Callsign: Kemblejet, | GB | AVCODES |
| 3199 | KMB | Delta Engineering Aviation | | | ICAO1 |
| 3200 | KMB | Kowloon Motor Bus Company | | HK | TRAFFIC |
