| 1 | PG | Bangkok Airways Co. Ltd. | ICAO: BKP, Callsign: Bangkok Air, IATA Prefix: 829, | T | AVCODES |
| 2 | PG | Aero Spacelines | Callsign: Aerospace, | USA | AVCODES |
| 3 | PG | Air Gabon Cargo | Callsign: Gaboncargo, | G | AVCODES |
| 4 | PG | PROCTOR & GAMBLE | | | PWRC |
| 5 | PGA | Portugalia | IATA: NI | | ICAO1 |
| 6 | PGAA | PEGASUS LOGISTICS GROUP | | | SCAC4 |
| 7 | PGAB | PAGE & BARNHILL TRUCKING INC | | | SCAC3 |
| 8 | PGAC | PETER GUNN AUTO SALES & LEASING INC | | | SCAC4 |
| 9 | PGAD | PGA DELIVERY SERVICE INC | | | SCAC3 |
| 10 | PGAD | PINZGAUER CANADA | | | SCAC4 |
| 11 | PGAM | PEP GAS | | | SCAC4 |
| 12 | PGAO | PRESTIGE AUTO TRANSPORT | | | SCAC4 |
| 13 | PGAR | PARTNERS BULK LOGISTICS | | | SCAC4 |
| 14 | PGAS | PERMAGAS INC | | | SCAC3 |
| 15 | PGAU | PAN-GULF LOGISTICS LTD | | | SCAC4 |
| 16 | PGAX | Continental Tank Car Corp. | added 1/1979; eliminated 10/1979; 1/1980 | | NAKINA |
| 17 | PGAX | Pressure Tank Car Co. | added 1/1964; 7/1965-1/1975; eliminated 1/1979 | | NAKINA |
| 18 | PGAX | Pressure Tank Car Co. | 7/65-1/75; eliminated 1/79 | | NRHS |
| 19 | PGAX | Continental Tank Car Corp. | added 1/79; 1/80 | | NRHS |
| 20 | PGAX | CONTINENTAL TANK CAR CORP. [PRESSURE TANK CAR CO.] | | | PWRC |
| 21 | PGAX | PRESSURE TANK CAR CO | | | SCAC3 |
| 22 | PGBC | PIGGYBACKCONSOLIDATORS INC | | | SCAC3 |
| 23 | PGBC | PIGGYBACKCONSOLIDA | | | SCAC4 |
| 24 | PGBI | PAGE BUS COMPANY INC | | | SCAC3 |
| 25 | PGBJ | PAPER TRANSPORT OF GREEN BAY INC (J | | | SCAC4 |
| 26 | PGBP | PIGGYBACK PLUS | | | SCAC3 |
| 27 | PGBQ | PIGGYBACK SERVICE CO | | | SCAC3 |
| 28 | PGBS | PENTAGON BUS SERVICE INC | | | SCAC3 |
| 29 | PGBS | PSALMS FREIGHT LINE | | | SCAC4 |
| 30 | PGBU | PERGAN GMBH | | | SCAC4 |
| 31 | PGBX | Peoples Gas By-Products Corp. | 7/1930-1/1941 | | NAKINA |
| 32 | PGBX | Peoples Gas By-Products Corp. | Apr-38 | | NRHS |
| 33 | PGBX | PEOPLES GAS BY-PRODUCTS CORP. | | | PWRC |
| 34 | PGC | Thai Cargo Airline Co., Ltd | Callsign: Thai Freighter, | T | AVCODES |
| 35 | PGC | European Aircraft Private Club | Callsign: Green Club, | B | AVCODES |
| 36 | PGCC | PITTSBURGH COACH CORP | | | SCAC3 |
| 37 | PGCC | PILGRIMS REST FARM INC | | | SCAC4 |
| 38 | PGCD | PROGISTIC CARRIERS LLC | | | SCAC4 |
| 39 | PGCJ | PEGG, C J | | | SCAC3 |
| 40 | PGCR | PRESTIGE CHARTER INC | | | SCAC3 |
| 41 | PGCR | PRONTO GREAT CHINA CORP | | | SCAC4 |
| 42 | PGCS | PAGEANT CO., S.A | | | SCAC3 |
| 43 | PGCT | PGC LOGISITCS LLC | | | SCAC4 |
| 44 | PGCU | GLOBAL CONTAINER TRADING GMBH | | | SCAC4 |
| 45 | PGCX | Poly Grinders Corp. | added 7/1977; 1/1980; eliminated 7/1981 | | NAKINA |
| 46 | PGCX | Peoples Gas Systems, Inc. | added 10/1985; 1/1994-7/2000; eliminated 4/2001; 7/2005 (not listed) | | NAKINA |
| 47 | PGCX | General American Transportation Corp. | 7/1937 (not listed) | | NAKINA |
| 48 | PGCX | Poly Grinders Corp. | added 7/77; 1/80; eliminated 7/81 | | NRHS |
| 49 | PGCX | Peoples Gas Systems, Inc. | 1/94-7/2000; eliminated 4/2001 | | NRHS |
| 50 | PGCX | *GENERAL AMERICAN TRANSPORTATION CORP. | | | PWRC |
| 51 | PGCX | *POLY GRINDERS CORP. | | | PWRC |
| 52 | PGCX | *PROCTOR & GAMBLE CELLULOSE | | | PWRC |
| 53 | PGCX | +PEOPLES GAS SYSTEM, INC. | | | PWRC |
| 54 | PGCX | Peoples Gas System | | | RSRV |
| 55 | PGCX | HERITAGE OPERATING L P | | | SCAC4 |
| 56 | PGDA | PKS Gdańsk | | PL | TRAFFIC |
| 57 | PGDL | PRESTIGE DELIVERY SYSTEMS INC | | | SCAC3 |
| 58 | PGDL | PRESTIGE DELIVERY SYSTEMS INC | | | SCAC4 |
| 59 | PGDN | PRESTIGE GRANITE DESIGN INC | | | SCAC4 |
| 60 | PGDR | PAGE, D R TRANSPORTATION INC | | | SCAC3 |
| 61 | PGDS | PEGASUS DELIVERY SERVICE INC | | | SCAC3 |
| 62 | PGDX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 63 | PGDX | General Electric Railcar Services Corp. | added 1/1999; eliminated 1/2000 | | NAKINA |
| 64 | PGDX | The Procter & Gamble Manufacturing Co. | added 1/1984; 1/1994; eliminated 1/1999 | | NAKINA |
| 65 | PGDX | The Proctor & Gamble Manufacturing Co. | 1/94; eliminated 1/99 | | NRHS |
| 66 | PGDX | General Electric Railcar Services Corp. | added 1/99; eliminated 1/2000 | | NRHS |
| 67 | PGDX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 68 | PGDX | GENERAL ELECTRIC RAIL SERVICES CORP.[PROCTER & GAMBLE MFG CO.] | | | PWRC |
| 69 | PGDX | Procter and Gamble Manufacturing | | | RSRV |
| 70 | PGDX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 71 | PGE | Prestigeavia | Callsign: Presto, Ceased operations | UA | AVCODES |
| 72 | PGE | Canadian National Railways | added 7/2005; 7/2005 | | NAKINA |
| 73 | PGE | BC Rail Ltd. | added 10/1984; 1/1994-7/2000; eliminated 7/2005 | | NAKINA |
| 74 | PGE | British Columbia Ry. Co. | 1/1975-1/1980; eliminated 10/1984 | | NAKINA |
| 75 | PGE | Pacific Great Eastern Ry. Co. | 8/1920-10/1966 | | NAKINA |
| 76 | PGE | Pacific Great Eastern Ry. Co. | 4/38-10/66 | | NRHS |
| 77 | PGE | British Columbia Ry. Co. | 1/75-1/80; eliminated 10/84 | | NRHS |
| 78 | PGE | BC Rail Ltd. | added 10/84; 1/94-7/2000 | | NRHS |
| 79 | PGE | CANADIAN NATIONAL RAILWAY [BC RAIL LTD.; PACIFIC GREAT EASTERN RWY.] | | | PWRC |
| 80 | PGE | Pacific Great Eastern Railway (Canadian National Railway) | | | RSRV |
| 81 | PGE | Pacific Great Eastern Railway | | CDN | TRAFFIC |
| 82 | PGEA | PARRY, RYAN INC | | | SCAC4 |
| 83 | PGEC | PAGE STEEL CO | | | SCAC4 |
| 84 | PGEE | PAGE, EILEEN | | | SCAC4 |
| 85 | PGEF | PANGEA FOSSILS LTD | | | SCAC4 |
| 86 | PGEI | PAGE INTERNATIONAL SA | | | SCAC3 |
| 87 | PGEJ | PILLIKEN, GLENN E JR | | | SCAC3 |
| 88 | PGEK | PAGE TRUCKING INC | | | SCAC4 |
| 89 | PGEL | PENDERGRASS, E L TRUCKING | | | SCAC3 |
| 90 | PGEL | PRESTIGE LOGISTICS LLC | | | SCAC4 |
| 91 | PGEM | PECHERIES G E M LTEE | | | SCAC4 |
| 92 | PGEN | PAGGEN, M TRUCKING | | | SCAC3 |
| 93 | PGEP | PROGRESSIVE EXPEDITORS INC | | | SCAC3 |
| 94 | PGEQ | PAGE TRUCKING INC | | | SCAC3 |
| 95 | PGER | BC Rail Ltd. | eliminated 4/1985 | | NAKINA |
| 96 | PGER | British Columbia Ry. Co. | 1/1975-1/1980 | | NAKINA |
| 97 | PGER | British Columbia Ry. Co. | 1/75-1/80 | | NRHS |
| 98 | PGER | BC Rail Ltd. | eliminated 4/85 | | NRHS |
| 99 | PGER | CANADIAN NATIONAL RAILWAY [BC RAIL LTD.; PACIFIC GREAT EASTERN RWY.] | | | PWRC |
| 100 | PGER | Pacific Great Eastern Railway (Canadian National Railway) | | | RSRV |
