| 1 | PIP | Aerokoncept Ltd. | Callsign: Aerokoncept, | RUS | AVCODES |
| 2 | PIP | Platinum Airways Co. Ltd. | Callsign: Thai Platinum, | T | AVCODES |
| 3 | PIP | Pilot Flyskole Flygerforening (PIFF) | Callsign: Pilot, | N | AVCODES |
| 4 | PIPC | PIPECO INC | | | SCAC3 |
| 5 | PIPD | PROLINE TRANSPORT INC | | | SCAC3 |
| 6 | PIPD | PIPE CREEK TRADING COMPANY | | | SCAC4 |
| 7 | PIPE | PIPELINE SERVICES INC | | | SCAC3 |
| 8 | PIPER | Piper Aircraft Inc. | | US-FL | TRAFFIC |
| 9 | PIPF | PIPEFUSION SERVICES INC | | | SCAC4 |
| 10 | PIPH | PIPER, E H TRUCKING | | | SCAC3 |
| 11 | PIPL | PIPELINE INDUSTRIES INC | | | SCAC3 |
| 12 | PIPM | PIPHO MILK TRANSPORT INC | | | SCAC3 |
| 13 | PIPN | PINEY POINT INDUSTRIES | | | SCAC3 |
| 14 | PIPO | PIONEER TRANSPORT, INC | | | SCAC3 |
| 15 | PIPO | PIONEER TRANSPORT INC | | | SCAC4 |
| 16 | PIPP | PIPPIN, EARL TRANSPORTER | | | SCAC3 |
| 17 | PIPQ | PITTSBURGH PHILADELPHIA TRANSPORTAT | | | SCAC3 |
| 18 | PIPQ | PIPEX INC | | | SCAC4 |
| 19 | PIPR | PIPCO TRANSPORTATION INC | | | SCAC3 |
| 20 | PIPR | PIPCO TRANSPORTATION INC | | | SCAC4 |
| 21 | PIPT | PIPELINE TRANSPORTATION | | | SCAC4 |
| 22 | PIPY | PISONY INTERNATIONAL PIPELINE EQUIP | | | SCAC4 |
| 23 | PIPZ | PINEY POINT PHOSPHATES, INC. | | | PWRC |
