| 8701 | PSCX | Xcel Energy | added 1/2006; eliminated 1/2008 | | NAKINA |
| 8702 | PSCX | Public Service Co. of Colorado | added 4/1973; 1/1975-7/2000; eliminated 10/2002; 7/2005 (not listed) | | NAKINA |
| 8703 | PSCX | Prolerized Steel Corp. | added 7/1960; 4/1961-10/1966; eliminated 10/1969 | | NAKINA |
| 8704 | PSCX | Prolerized Steel Corp. | added 7/60; 4/61-10/66; eliminated 10/69 | | NRHS |
| 8705 | PSCX | Public Service Co. of Colorado | added 4/73; 1/75-1/80 | | NRHS |
| 8706 | PSCX | Public Services Co. of Colorado | 1/94-7/2000 | | NRHS |
| 8707 | PSCX | *PROLERIZED STEEL CORP. | | | PWRC |
| 8708 | PSCX | +XCEL ENERGY [PUBLIC SERVICE COMPANY OF COLORADO] | | | PWRC |
| 8709 | PSCX | Public Service of Colorado | | | RSRV |
| 8710 | PSCX | PROLERIZED STEEL CORP | | | SCAC3 |
| 8711 | PSCX | XCEL ENERGY | | | SCAC4 |
| 8712 | PSCY | PEARLNYPMH SHIPPING LTD. | | | SCAC3 |
| 8713 | PSCZ | XCEL ENERGY [PUBLIC SERVICE COMPANY OF COLORADO] | | | PWRC |
| 8714 | PSD | President Airlines | IATA: TO, IATA Prefix: 540, Desginator TO reinstated by IATA | K | AVCODES |
| 8715 | PSD | President Airlines | IATA: TO | | ICAO1 |
| 8716 | PSDA | POSEIDON LINES | | | SCAC4 |
| 8717 | PSDE | PRESIDENTIAL ENTERPRISES | | | SCAC3 |
| 8718 | PSDF | PRECISION SPECIALIZED DIVISION INC | | | SCAC4 |
| 8719 | PSDI | PATS DISTRIBUTING INC | | | SCAC3 |
| 8720 | PSDJ | PESTELL, D J TRANSPORT LTD | | | SCAC4 |
| 8721 | PSDL | POSTAL DELIVERY SERVICE INC | | | SCAC3 |
| 8722 | PSDN | PREMUDA SOCIETA DI NAVIGAZIONE P A | | | SCAC3 |
| 8723 | PSDN | PREMUDA SOCIETA DI NAVIGAZIONE P A | | | SCAC4 |
| 8724 | PSDQ | PIEDMONT TRANSPORT | | | SCAC4 |
| 8725 | PSDR | PAY N SAVE DRUG STORES INC | | | SCAC3 |
| 8726 | PSDS | PERSONAL DELIVERY SERVICE | | | SCAC3 |
| 8727 | PSDS | PESCADOS Y MARISCOS PLAYA HERMOSA D | | | SCAC4 |
| 8728 | PSDT | PESCADOR TRANSPORTATION | | | SCAC3 |
| 8729 | PSDT | PORTSIDE TRUCKING INC | | | SCAC4 |
| 8730 | PSDU | PIGOTT SHAFT DRILLING LIMITED | | GB | BIC |
| 8731 | PSDU | PIGOTT SHAFT DRILLING LIMITED | | | SCAC4 |
| 8732 | PSDV | POSITIVE DELIVERY SYSTEMS | | | SCAC3 |
| 8733 | PSDV | PINDER FARMS | | | SCAC4 |
| 8734 | PSDY | PRESTIGE DELIVERY INC | | | SCAC3 |
| 8735 | PSE | Aeroservicio Sipse, S.A. de C.V. | Callsign: Sipse, | MEX | AVCODES |
| 8736 | PSE | Aeroservicio Sipse | | | ICAO1 |
| 8737 | PSEB | P S EXPRESS | | | SCAC4 |
| 8738 | PSEC | PACESETTER COACH LINES INC | | | SCAC3 |
| 8739 | PSED | PENNINGTON SEED INC | | | SCAC3 |
| 8740 | PSED | PENNINGTON SEED INC | | | SCAC4 |
| 8741 | PSEE | P & S EXPRESS INC | | | SCAC3 |
| 8742 | PSEE | PARENT SEED FARMS LTD | | | SCAC4 |
| 8743 | PSEF | PEACH STATE EXPRESS LLC | | | SCAC4 |
| 8744 | PSEH | PROTECT SERVICES | | | SCAC4 |
| 8745 | PSEI | POST EXPRESS INC | | | SCAC3 |
| 8746 | PSEI | PLANT STAND OF AZ INC, THE | | | SCAC4 |
| 8747 | PSEK | PIER SOLUTIONS EQUIPMENT LEASING IN | | | SCAC4 |
| 8748 | PSEM | PARKER SEMINARS | | | SCAC4 |
| 8749 | PSEN | P AND S ENTERPRISES INC | | | SCAC4 |
| 8750 | PSEO | PRO STAR ENTERPRISES LLC | | | SCAC4 |
| 8751 | PSEP | PSC ENVIRONMENTAL SERVICES OF POMON | | | SCAC4 |
| 8752 | PSEQ | P S EQUIPMENT CO | | | SCAC3 |
| 8753 | PSER | PLAINS EXPRESS INC | | | SCAC3 |
| 8754 | PSER | PEACE TRANSPORT INC | | | SCAC4 |
| 8755 | PSES | PASCO, EMIL & SON TRUCKING | | | SCAC3 |
| 8756 | PSET | PAULSEN TRUCKING INC | | | SCAC3 |
| 8757 | PSET | POWER SERV ENGINE & COMPRESSOR 1998 | | | SCAC4 |
| 8758 | PSEU | PANSTAR CO, LTD | | ROK | BIC |
| 8759 | PSEX | Public Service Electric & Gas Co. | 7/1930-1/1941 | | NAKINA |
| 8760 | PSEX | Public Service Electric & Gas Co. | Apr-38 | | NRHS |
| 8761 | PSF | Plymouth School Of Flying Ltd. | Callsign: Lizard, | GB | AVCODES |
| 8762 | PSF | Plymouth School of Flying | | | ICAO1 |
| 8763 | PSFB | PACIFIC SOUTHCOAST FREIGHT BUREAU ( | | | SCAC3 |
| 8764 | PSFD | PARIS FOODS CORPORATION | | | SCAC3 |
| 8765 | PSFI | PARKSIDE FUEL INC | | | SCAC4 |
| 8766 | PSFK | PASIFIK GEMI ISLETMECILIGI AS | | | SCAC4 |
| 8767 | PSFL | Puget Sound Freight Lines | 1/1975-7/2005 | | NAKINA |
| 8768 | PSFL | PUGET SOUND FREIGHT LINES | | | PWRC |
| 8769 | PSFL | Puget Sound Freight Lines | | | RSRV |
| 8770 | PSFL | PUGET SOUND FREIGHT LINES | | | SCAC3 |
| 8771 | PSFT | PRIMARY SOURCE FOR TRANSPORTATION S | | | SCAC3 |
| 8772 | PSFX | PORT OF SAN FRANCISCO | | | PWRC |
| 8773 | PSFZ | Flexi-Van Leasing | | | RSRV |
| 8774 | PSFZ | FLEXI-VAN LEASING INC | | | SCAC4 |
| 8775 | PSG | Aviones Para Servirle, S.A. de C.V. | Callsign: Aviones Are, | MEX | AVCODES |
| 8776 | PSG | Pier Seven Aviation Limited | Callsign: Pier Jet, | WAG | AVCODES |
| 8777 | PSG | Aviones Para Servirle | | | ICAO1 |
| 8778 | PSGA | PITCHERVILLE SAND & GRAVEL INC | | | SCAC4 |
| 8779 | PSGC | PEACH STATE LOGISTICS LLC | | | SCAC4 |
| 8780 | PSGD | PRACTICA SHIPPING CORPORATION LTD | | | SCAC4 |
| 8781 | PSGE | PRESTIGE GLASS (2002) LTD | | | SCAC4 |
| 8782 | PSGF | POINT ST GEORGE FISHERIES | | | SCAC3 |
| 8783 | PSGM | PLATINUM SERVICES GROUP INC | | | SCAC4 |
| 8784 | PSGN | PRECISION LOGISTICS LLC | | | SCAC4 |
| 8785 | PSGP | PASHA GROUP, THE | | | SCAC4 |
| 8786 | PSGR | PRO-STAIR & RAILING INC | | | SCAC4 |
| 8787 | PSGS | PRIME STORAGE SYSTEMS INC | | | SCAC4 |
| 8788 | PSGT | PARAMOUNT STORAGE LTD | | | SCAC4 |
| 8789 | PSGU | PSG CORPORATION | | ROK | BIC |
| 8790 | PSGU | PSG CORPORATION | | | SCAC4 |
| 8791 | PSGX | Public Service Gas Co. | 7/1923 | | NAKINA |
| 8792 | PSGX | PUBLIC SERVICE GAS CO. | | | PWRC |
| 8793 | PSH | Helidrome Ltd. t/a Red Aviation | Callsign: Passion, | GB | AVCODES |
| 8794 | PSH | Red Aviation | | | ICAO1 |
| 8795 | PSHA | PASHA STEVEDORING & TERMINALS L P | | | SCAC4 |
| 8796 | PSHB | PORTLAND SHIP BUILDING COMPANY | | | SCAC3 |
| 8797 | PSHC | PENINSULA SHIPPERS CONSOLIDATION | | | SCAC3 |
| 8798 | PSHD | PANSHIP LTD | | | SCAC4 |
| 8799 | PSHE | PORT SHUTTLE INC | | | SCAC3 |
| 8800 | PSHF | PACKAGING SHUTTLEXPRESS | | | SCAC4 |
