| 1 | KP | Kiwi International Air Lines | ICAO: KIA, Callsign: Kiwi Air, IATA Prefix: 538, Ceased operations | USA | AVCODES |
| 2 | KP | Air Cape | ICAO: ACP, Callsign: Cape, Designator KP recalled by IATA | ZA | AVCODES |
| 3 | KP | ASKY | ICAO: SKK, Callsign: Asky Airline, IATA Prefix: 032, | TG | AVCODES |
| 4 | KP | PT. Asialink Cargo Express | ICAO: AKC, Callsign: Asialink Cargo, IATA Prefix: 385, | RI | AVCODES |
| 5 | KP | Kombinovani prevoz d.o.o., Novi Beograd | | RS | VKM |
| 6 | KPA | Kun Peng Airlines Co. Ltd | Callsign: Kun Peng, | PRC | AVCODES |
| 7 | KPA | Kunpeng Airlines | IATA: VD | | ICAO1 |
| 8 | KPAC | K-PAC LOGISTIC SERVICES | | | SCAC4 |
| 9 | KPAF | Korean People's Army Air Force | Chosŏn-inmin'gun kong'gun: 조선인민군 공군 | PRK | TRAFFIC |
| 10 | KPAG | KEN PAGE TRANSFER | | | SCAC3 |
| 11 | KPAP | KYZER PLANTS & PRODUCE INC | | | SCAC4 |
| 12 | KPAT | KP AUTO TRANSPORT | | | SCAC4 |
| 13 | KPBC | KEIPER, B & C INC | | | SCAC3 |
| 14 | KPBL | KPB LANDBRIDGE LLC | | | SCAC4 |
| 15 | KPBQ | KAPITAN BABIEVSKIY SHIPPING CO LTD, | | | SCAC3 |
| 16 | KPBQ | KW TRANSPORTATION SERVICES | | | SCAC4 |
| 17 | KPBS | KNAPPS BUS LINES | | | SCAC3 |
| 18 | KPBS | K-WAY EXPRESS | | | SCAC4 |
| 19 | KPBT | KPB TRANSPORTATION LLC | | | SCAC4 |
| 20 | KPCA | K P CARRIERS INC | | | SCAC4 |
| 21 | KPCC | KUE PERSONAL CARE PRODUCTS | | | SCAC4 |
| 22 | KPCD | KONOIKE-PACIFIC CALIFORNIA INC | | | SCAC4 |
| 23 | KPCHELM | Komunikacja Prywatna, Chełm | | PL | TRAFFIC |
| 24 | KPCI | KPC INC | | | SCAC3 |
| 25 | KPCJ | KOPISCHKA, JACK TRUCKING | | | SCAC3 |
| 26 | KPCL | K P COMFORT LINES | | | SCAC3 |
| 27 | KPCU | KIRLOSKAR PNEUMATIC CO. LTD. HADAPSAR, PUNE | | IND | BIC |
| 28 | KPCX | Koppers Industries, Inc. | added 10/1989; 1/1994-7/2005 | | NAKINA |
| 29 | KPCX | Koppers Co. | 7/1937-4/1938 | | NAKINA |
| 30 | KPCX | Koppers Co., Inc. | 1/1941-1/1980; eliminated 10/1989 | | NAKINA |
| 31 | KPCX | Koppers Products Co. | 8/1920; 7/1935 | | NAKINA |
| 32 | KPCX | Koppers Co., Inc. | 4/38-1/80; eliminated 10/89 | | NRHS |
| 33 | KPCX | Koppers Industries, Inc. | added 10/89; 1/94-7/2000 | | NRHS |
| 34 | KPCX | KOPPERS INDUSTRIES, INC. [KOPPERS COMPANY, INC.] | | | PWRC |
| 35 | KPCX | Koppers Industries | | | RSRV |
| 36 | KPCX | KOPPERS INDUSTRIES, INC. | | | SCAC4 |
| 37 | KPCZ | K AND P CARTAGE COMPANY | | | PWRC |
| 38 | KPCZ | K and P Cartage | | | RSRV |
| 39 | KPCZ | K & P CARTAGE CO INC | | | SCAC4 |
| 40 | KPEP | K P EXPRESS | | | SCAC4 |
| 41 | KPET | KAPLAN, E L TRUCKING CO INC | | | SCAC3 |
| 42 | KPEU | LLC TC CONTAINER TRANSPORTATION | | RUS | BIC |
| 43 | KPEV | Königliche Preussische Eisenbahn-Verwaltung | Real: K.P.E.V., Am Anfang: Königlich Preußische und Großherzogliche Hessische Staatseisenbahn | D | TRAFFIC |
| 44 | KPFA | K & P FARMS | | | SCAC4 |
| 45 | KPFC | KELLY PROPANE & FUEL LLC | | | SCAC4 |
| 46 | KPFF | KROPF FARMS | | | SCAC4 |
| 47 | KPFL | KLUMP TRUCKING LLC | | | SCAC4 |
| 48 | KPFS | KALITTA AIR (PILOT FREIGHT | | | SCAC4 |
| 49 | KPGQ | KAP GRISHIN SHIPPING CO., LTD. | | | SCAC3 |
| 50 | KPGR | KOPPINGER TRUCKING LLC | | | SCAC4 |
| 51 | KPGW | KNAPP, G W & SON INC | | | SCAC4 |
| 52 | KPGX | Kentucky Processing Co. | added 1/1997; eliminated 1/1999; 7/2000 (not listed) | | NAKINA |
| 53 | KPGX | Kentucky Processing Co. | added 1/97; eliminated 1/99; 7/2000 | | NRHS |
| 54 | KPGX | KENTUCKY PROCESSING COMPANY | | | PWRC |
| 55 | KPGX | Kentucky Processing | | | RSRV |
| 56 | KPH | Kazan Plant Of Helicopters | Callsign: Kama, | RUS | AVCODES |
| 57 | KPH | Kazan Helicopters | | | ICAO1 |
| 58 | KPHU | KAZPHOSPHA | | | SCAC4 |
| 59 | KPHZD | Klub priatel’ov histórie železničnej dopravy | | SK | TRAFFIC |
| 60 | KPII | KAPLAN INDUSTRIES INC | | | SCAC3 |
| 61 | KPIL | KPI LOGISTICS INC | | | SCAC4 |
| 62 | KPIQ | KIOWA PEAK INDUSTRIES INC | | | SCAC4 |
| 63 | KPIU | KPIC CORPORATION | | | SCAC4 |
| 64 | KPJ | Karthago Private Jet | | TN | AVCODES |
| 65 | KPKC | KRISP-PAK CO INC | | | SCAC4 |
| 66 | KPKLK | Kopalnia Piasku Kotlamia - Linie Kolejowe sp. Z o.o. | | PL | VKM |
| 67 | KPKM | Komunalne Przedsiębiorstwo Komunikacji Miejskiej Białystok | City: Białystok | PL | TRAFFIC |
| 68 | KPKOT | KOPALNIA PIASKU “KOTLARNIA\" SPÓŁKA AKCYJNA | | PL | VKM |
| 69 | KPKQ | KOEPKE TRUCK LINES | | | SCAC3 |
| 70 | KPKT | KILPATRICK TRUCKING INC | | | SCAC4 |
| 71 | KPKU | KRAJMAN PIOTR KRAJEWSKI | | PL | BIC |
| 72 | KPLD | KINGPIN LOGISTICS LTD | | | SCAC4 |
| 73 | KPLI | KINLEY PIPELINE COMPANY | | | SCAC3 |
| 74 | KPLK | K P L TRUCKING | | | SCAC4 |
| 75 | KPLM | KEPLEY, MALVIN G | | | SCAC3 |
| 76 | KPLN | KAPLAN TRUCKING INC | | | SCAC3 |
| 77 | KPLO | KRUPP LONRHO GMBH | | | SCAC3 |
| 78 | KPLO | KAPELLEN TRANSPORTATION INC | | | SCAC4 |
| 79 | KPLQ | KAPLAN TRUCKLIN INC | | | SCAC3 |
| 80 | KPLR | KEPLER BROTHERS INC | | | SCAC3 |
| 81 | KPLT | KPL TRUCKING INC | | | SCAC4 |
| 82 | KPLU | K LINE | | | PWRC |
| 83 | KPLU | K Line | | | RSRV |
| 84 | KPLX | Western Resources, Inc. | 7/2000-7/2005 | | NAKINA |
| 85 | KPLX | Agrex, Inc. | added 1/1985; eliminated 1/1988 | | NAKINA |
| 86 | KPLX | Koppel, Inc. | added 10/1979; 1/1980; eliminated 1/1985 | | NAKINA |
| 87 | KPLX | Koppel, Inc. | 1/80; eliminated 1/85 | | NRHS |
| 88 | KPLX | Agrex, Inc. | added 1/85; eliminated 1/88 | | NRHS |
| 89 | KPLX | Western Resources, Inc. | Jul-00 | | NRHS |
| 90 | KPLX | WESTAR ENERGY [WESTERN RESOURCES, INC.; AGREX INC.; KOPPEL INC.] | | | PWRC |
| 91 | KPLX | Koppel (Western Resources) | | | RSRV |
| 92 | KPLX | WESTERN RESOURCES, INC. | | | SCAC4 |
| 93 | KPLX | Koppel (Western Resources) | | USA | TRAFFIC |
| 94 | KPLY | KEEBEE PLAY | | | SCAC4 |
| 95 | KPM | Sky Prim Air | Callsign: Sky Primair, | MD | AVCODES |
| 96 | KPML | K P M TRANSPORT LIMITED | | | SCAC3 |
| 97 | KPMN | KITCHEN PRIDE MUSHROOM FARMS INC | | | SCAC4 |
| 98 | KPMP | KAPAL MANAGEMENT PRIVATE LTD. | | | SCAC3 |
| 99 | KPMQ | KAPITAN MEDVETSKIY SHIPPING CO LTD, | | | SCAC3 |
| 100 | KPMT | KUHL, PAM HORSE TRANSPORTATION | | | SCAC3 |
