| 1 | PAC | Polar Air Cargo, Inc. | IATA: PO, Callsign: Polar, IATA Prefix: 403, Name changed to Polar Air Cargo Worldwide, Inc. ICAO Callsign changed from Polar Tiger | USA | AVCODES |
| 2 | PAC | Polar Air Cargo, Inc. | IATA: PO, Callsign: Polar Tiger, IATA Prefix: 403, ICAO Callsign changed to Polar | USA | AVCODES |
| 3 | PAC | Polar Air Cargo Worldwide, Inc. | IATA: PO, Callsign: Polar, IATA Prefix: 403, Name changed from Polar Air Cargo, Inc. ICAO Callsign changed from Polar Tiger | USA | AVCODES |
| 4 | PAC | Polar Air Cargo | IATA: PO | | ICAO1 |
| 5 | PAC | Polar Air Cargo | Real: PAC, PO | USA | TRAFFIC |
| 6 | PACA | PREMIER AIR CARGO SALES & LOGISTICS | | | SCAC4 |
| 7 | PACB | PACIFIC BULK TRANSPORTATION CO | | | SCAC3 |
| 8 | PACB | PACIFIC BULK TRANSPORTATION CO INC | | | SCAC4 |
| 9 | PACD | PACIFIC ATLANTIC COASTAL EXPRESS | | | SCAC3 |
| 10 | PACE | PACE TRANSPORTATION INC | | | SCAC4 |
| 11 | PACE | PACE (Chicago, Ill.) | | USA | TRAFFIC |
| 12 | PACF | PUGLIESE AND COMPANY | | | SCAC4 |
| 13 | PACG | PACIFIC TRANSPORTATION GROUP INC | | | SCAC3 |
| 14 | PACG | PACIFIC GREEN INC | | | SCAC4 |
| 15 | PACH | PRIORITY AIR CHARTER LLC | | | SCAC4 |
| 16 | PACI | PACIFIC CHEMICALS INDUSTRIES | | | PWRC |
| 17 | PACI | PACIFIC SEABRIDGE | | | SCAC3 |
| 18 | PACI | PACIFIC ENDEAVOR SHIPPING INC | | | SCAC4 |
| 19 | PACJ | P A C OCEAN LINES | | | SCAC4 |
| 20 | PACN | PACIFIC INTERNATIONAL FREIGHT SYSTE | | | SCAC3 |
| 21 | PACO | PARCEL DELIVERY SERVICE | | | SCAC3 |
| 22 | PACP | PACIFIC AGRI-PRODUCTS INC | | | SCAC3 |
| 23 | PACQ | PACIFIC EXPRESS | | | SCAC3 |
| 24 | PACS | PACIFIC STORAGE COMPANY | | | SCAC3 |
| 25 | PACS | PACIFIC STORAGE COMPANY | | | SCAC4 |
| 26 | PACSA | Pacific Sky Aviation | | CDN | TRAFFIC |
| 27 | PACU | XPO LOGISTICS | | USA | BIC |
| 28 | PACU | Pacer International | | | RSRV |
| 29 | PACU | PACE LINE (PACIFIC AMERICA CONTAINE | | | SCAC3 |
| 30 | PACU | PACER STACKTRAIN | | | SCAC4 |
| 31 | PACV | PACIFIC VAN & STORAGE CO INC | | | SCAC3 |
| 32 | PACV | PIEDMONT AVIATION COMPONENT | | | SCAC4 |
| 33 | PACW | PAC-EX | | | SCAC4 |
| 34 | PACX | Plasser American Corp. | 1/1994-7/2005 (not listed) | | NAKINA |
| 35 | PACX | Pacific Supply Cooperative | added 10/1974; 1/1975; eliminated 1/1978 | | NAKINA |
| 36 | PACX | Pacific Supply Cooperative | added 10/74; 1/75; eliminated 1/78 | | NRHS |
| 37 | PACX | Plasser American Corp. | 1/94-7/2000 | | NRHS |
| 38 | PACX | PLASSER AMERICAN CORP. | | | PWRC |
| 39 | PACX | Plasser American Corporation | | | RSRV |
| 40 | PACX | PLASSER AMERICAN CORPORATION | | | SCAC4 |
| 41 | PACY | Prairie Central Ry. Co. | added 10/1981; eliminated 1/1986 | | NAKINA |
| 42 | PACY | Prairie Central Ry. Co. | added 10/81; eliminated 1/86 | | NRHS |
| 43 | PACY | PRAIRIE CENTRAL RAILWAY CO. | | | PWRC |
| 44 | PACY | Prairie Central Railway | | | RSRV |
| 45 | PACZ | PAPER CALMENSON & CO. | | | PWRC |
