| 1 | PKP | Mountain Air Express, Inc. | Callsign: Pikes Peak, Designator M7 recalled by IATA | USA | AVCODES |
| 2 | PKP | Mountain Air Express, Inc. | IATA: M7, Callsign: Pikes Peak, Designator M7 recalled by IATA | USA | AVCODES |
| 3 | PKP | Mountain Air Express | | | ICAO1 |
| 4 | PKP | | | PL | TRAFFIC |
| 5 | PKP | Polskie Koleje Panstwowe | | PL | VKM |
| 6 | PKPC | PARK TRANSPORT CO. | | | SCAC3 |
| 7 | PKPC | PORKCHOP TRANSPORTATION INC | | | SCAC4 |
| 8 | PKPC | PKP Cargo | | PL | TRAFFIC |
| 9 | PKPC | PKP CARGO Spólka Akcyjna | | PL | VKM |
| 10 | PKPCS | PKP CARGO SERVICE Sp. z o.o. | | PL | VKM |
| 11 | PKPE | PKP Energetyka S.A. | | PL | VKM |
| 12 | PKPG | POLE AND KINGHAM PIPE ORGANS | | | SCAC4 |
| 13 | PKPH | PICKS PACK HAULER INC | | | SCAC3 |
| 14 | PKPH | PICKS PACK HAULER INC | | | SCAC4 |
| 15 | PKPIC | PKP INTERCITY S.A. | | PL | VKM |
| 16 | PKPL | PICK-N-PULL | | | SCAC4 |
| 17 | PKPLS | PKP Linia Hutnicza Szerokotorowa spólka z o.o. | | PL | VKM |
| 18 | PKPM | PERKINS PETROLEUM INC | | | SCAC4 |
| 19 | PKPOL | PKS Polonus w Warszawie | | PL | TRAFFIC |
| 20 | PKPOZN | Przedsiêbiorstwo Komunikacji Samochodowej w Poznaniu S.A. | Real: PKS | PL | TRAFFIC |
| 21 | PKPPR | Przewozy Regionalne | | PL | TRAFFIC |
| 22 | PKPR | PAHLKE PIPE & ROD | | | SCAC4 |
| 23 | PKPRZ | PKS Przemyśl | | PL | TRAFFIC |
| 24 | PKPS | PATSKAN TRANSPORT SERVICE INC | | | SCAC3 |
| 25 | PKPSZ | PKS w Pszczynie | | PL | TRAFFIC |
| 26 | PKPU | PKP CARGO CONNECT | | PL | BIC |
| 27 | PKPW | PISCES TANKER CORPORATION | | | SCAC4 |
