| 1 | PPR | Propstar Aviation Ltd | Callsign: Propstar, | GB | AVCODES |
| 2 | PPRC | PAPER RECOVERY OF SAN DIEGO INC | | | SCAC3 |
| 3 | PPRE | PLEASANT PAPER RECYCLING INC | | | SCAC4 |
| 4 | PPRF | PORT IMPERIAL FERRY | | | SCAC3 |
| 5 | PPRG | PULIDO, P TRUCKING | | | SCAC4 |
| 6 | PPRI | PENN PRIDE INC | | | SCAC4 |
| 7 | PPRK | P & P TRUCKING INC | | | SCAC4 |
| 8 | PPRL | PHILPOT RELOCATION SYSTEMS | | | SCAC4 |
| 9 | PPRQ | PAPER TRANSPORT COMPANY, THE | | | SCAC3 |
| 10 | PPRR | PARADISE & PACIFIC RAILROAD | | | PWRC |
| 11 | PPRS | PEPPERS TRANSPORT INC | | | SCAC4 |
| 12 | PPRX | ConocoPhillips Co. | added 10/2003; 7/2005 | | NAKINA |
| 13 | PPRX | Phillips Petroleum Co. | added 1/2001; eliminated 10/2003 | | NAKINA |
| 14 | PPRX | Potash Reduction Co., Inc. | 8/1920-7/1923 | | NAKINA |
| 15 | PPRX | Phillips Petroleum Co. | added 1/2001 | | NRHS |
| 16 | PPRX | *POTASH REDUCTION CO., INC. | | | PWRC |
| 17 | PPRX | +CONOCOPHILLIPS CO. [PHILLIPS PETROLEUM COMPANY] | | | PWRC |
| 18 | PPRX | Phillips Petroleum | | | RSRV |
| 19 | PPRX | CONOCOPHILLIPS COMPANY | | | SCAC4 |
| 20 | PPRY | PORT OF PORT ROYAL INC | | | SCAC3 |
