| 1 | PLK | Pulkovo Aviation Enterprise | IATA: Z8, Callsign: Pulkovo, IATA Desigantor changed to FV. Name changed from Air Enterprise Pulkovo | RUS | AVCODES |
| 2 | PLK | Air Enterprise Pulkovo | IATA: Z8, Callsign: Pulkovo, Name changed to Pulkovo Aviation Enterprise | RUS | AVCODES |
| 3 | PLK | Pulkovo Aviation Enterprise | IATA: FV, Callsign: Pulkovo, IATA Prefix: 195, Merged with State Transport Company of Russia to form Rossiya Airlines OJSC. Name changed from Air Enterprise Pulkovo. IATA Desigantor changed from Z8 | RUS | AVCODES |
| 4 | PLK | Pulkovo Aviation Enterprise | IATA: FV | | ICAO1 |
| 5 | PLK | PKP Polskie Linie Kolejowe Spółka Akcyjna | | PL | VKM |
| 6 | PLKA | PELKA TRUCKING | | | SCAC3 |
| 7 | PLKD | PAULK TRUCKING INC | | | SCAC3 |
| 8 | PLKD | PEEL TRANSPORT LTD | | | SCAC4 |
| 9 | PLKG | P & L TRUCKING INC | | | SCAC3 |
| 10 | PLKG | RENDAL A POULIN | | | SCAC4 |
| 11 | PLKI | PLISINSKI BROS INC | | | SCAC3 |
| 12 | PLKI | PEARL KITCHENS | | | SCAC4 |
| 13 | PLKJ | POLLOCK, J TRANSPORT | | | SCAC3 |
| 14 | PLKK | PIERSON, L K & K TRUCKING INC | | | SCAC3 |
| 15 | PLKK | PILKINGTON TRUCKING | | | SCAC4 |
| 16 | PLKLK | PETROTEL-LUKOIL SA | | RO | VKM |
| 17 | PLKM | PLAKOURA MARITIME CORPORATION | | | SCAC3 |
| 18 | PLKN | P & L TRUCKING | | | SCAC3 |
| 19 | PLKN | PILOT TRUCK LINER INC | | | SCAC4 |
| 20 | PLKO | POLK OIL CO INC | | | SCAC4 |
| 21 | PLKQ | PELKEY TRANSPORATION INC | | | SCAC3 |
| 22 | PLKQ | PACIFIC LINK INTL FREIGHT | | | SCAC4 |
| 23 | PLKT | POLK TRAVEL | | | SCAC3 |
| 24 | PLKT | PLAK-IT | | | SCAC4 |
| 25 | PLKW | POLLOCK, W TRUCKING INC | | | SCAC4 |
| 26 | PLKW | KOLEJE WIELKOPOLSKIE Sp. z o.o. | | PL | VKM |
