| 1901 | PDBC | PIONEER DISTRIBUTING INC | | | SCAC4 |
| 1902 | PDBQ | PACIFIC DELECTABLES INC | | | SCAC4 |
| 1903 | PDBS | PAPER DISTRIBUTION SERVICES INC | | | SCAC3 |
| 1904 | PDBS | PASHA DISTRIBUTION SERVICES | | | SCAC4 |
| 1905 | PDBT | PRESTON DOBBS TRUCK SERVICE | | | SCAC3 |
| 1906 | PDBV | PARADISE BEVERAGES INC | | | SCAC4 |
| 1907 | PDC | Potomac Air, Inc. | IATA: BK, Callsign: District, IATA Prefix: 522, Formed out of merger of United Air Lines and US Airways | USA | AVCODES |
| 1908 | PDC | Potomac Air | IATA: BK | | ICAO1 |
| 1909 | PDC | PINNEY DOCK CO. | | | PWRC |
| 1910 | PDCB | PACIFIC DAIRY CENTRE LTD | | | SCAC4 |
| 1911 | PDCE | PACKAGE DELIVERY COMPANY | | | SCAC4 |
| 1912 | PDCH | PDC GLASS OF MICHIGAN INC | | | SCAC4 |
| 1913 | PDCI | PREFERRED CARRIERS INC | | | SCAC4 |
| 1914 | PDCL | PETREDEC LTD., HAMILTON, BERMUDA | | | SCAC3 |
| 1915 | PDCL | PETREDEC LTD BERMUDA | | | SCAC4 |
| 1916 | PDCM | PHELPS DODGE CORP. (MORENCI BRANCH) | | | PWRC |
| 1917 | PDCM | PRODUCT DISTRIBUTION COMPANY | | | SCAC3 |
| 1918 | PDCN | PHELPS DODGE CORP. (NEW CORNELIA MINE, AJO, AZ) | | | PWRC |
| 1919 | PDCO | PORT DISTRIBUTING CORP | | | SCAC3 |
| 1920 | PDCP | PARADICE CONTAINER PORT (DIV THOMAS | | | SCAC3 |
| 1921 | PDCQ | PAS POINT DRAYAGE CO | | | SCAC3 |
| 1922 | PDCQ | PADILLA, CESAR | | | SCAC4 |
| 1923 | PDCR | PADENA CORP | | | SCAC3 |
| 1924 | PDCR | PRADON CONSTRUCTION & TRUCKING CO I | | | SCAC4 |
| 1925 | PDCS | PEDASTA s.r.o. | | CZ | VKM |
| 1926 | PDCT | PDC TRUCKING COMPANY & SHENANDOAH DISTRIBUTION CENTERS | | | SCAC3 |
| 1927 | PDCU | PEORIA DISPOSAL COMPANY | | | SCAC3 |
| 1928 | PDCV | PRODUCTIVE TRANSPORTATION INC | | | SCAC3 |
| 1929 | PDCW | PHOENIX DRILLING CORP | | | SCAC4 |
| 1930 | PDCZ | PORTLAND DEVELOPMENT COMMISSION | | | PWRC |
| 1931 | PDD | Phillips Alaska, Inc. | Callsign: Pada, | USA | AVCODES |
| 1932 | PDD | Phillips Alaska | | | ICAO1 |
| 1933 | PDDI | PARTREDDERIET IDALITH | | | SCAC3 |
| 1934 | PDDK | PRESIDENTS DESK | | | SCAC4 |
| 1935 | PDDL | PREFERRED DISPATCH INC | | | SCAC3 |
| 1936 | PDDN | PORTEADORES DEL NOROESTE S A DE C | | | SCAC4 |
| 1937 | PDDO | PACER STACTRAIN | | | SCAC4 |
| 1938 | PDDQ | P D Q DELIVERY | | | SCAC3 |
| 1939 | PDEA | PROPANE DIRECT ENTERPRISES LLC | | | SCAC4 |
| 1940 | PDEC | PRIDE OF THE COUNTRY CARRIERS INC | | | SCAC3 |
| 1941 | PDEC | PRIDE EXPRESS LIMITED LLC | | | SCAC4 |
| 1942 | PDED | P D EXPRESS | | | SCAC3 |
| 1943 | PDED | PDS BROKERAGE | | | SCAC4 |
| 1944 | PDEF | PRIDE TRANSPORTATION INC | | | SCAC3 |
| 1945 | PDEI | PROFESSIONAL DELIVERY INC | | | SCAC3 |
| 1946 | PDEL | PERISHABLE DELIVERIES, INC | | | SCAC3 |
| 1947 | PDEL | PERISHABLE DELIVERIES INC | | | SCAC4 |
| 1948 | PDEO | PD EXPRESS | | | SCAC3 |
| 1949 | PDEP | PENN-DEL EXPRESS | | | SCAC3 |
| 1950 | PDEQ | PROMPT DELIVERY SERVICE | | | SCAC3 |
| 1951 | PDEQ | PODOLINSKY EQUIPMENT LTD | | | SCAC4 |
| 1952 | PDER | PONDER, R A TRANSPORT | | | SCAC3 |
| 1953 | PDER | PEDERSEN, LEE | | | SCAC4 |
| 1954 | PDET | PRIDE EXPRESS & TRANSFER CO INC | | | SCAC3 |
| 1955 | PDET | PDE TRANSPORT INC | | | SCAC4 |
| 1956 | PDEV | PATS DELIVERY | | | SCAC3 |
| 1957 | PDF | LAR Transregional, Linhas Aerea Regionais, S.A. | IATA: TH, Designator TH recalled by IATA | P | AVCODES |
| 1958 | PDF | LAR Transregional, Linhas Aerea Regionais, S.A. | Callsign: Transregional, | P | AVCODES |
| 1959 | PDF | Pelican Air Services CC d/b/a Pelican Air | IATA: 7V, Callsign: Pelican Airways, Name changed to Federal Air (Pty) Ltd. Designator 7V reinstated by IATA | ZA | AVCODES |
| 1960 | PDF | Pelican Air Services | | | ICAO1 |
| 1961 | PDFC | PEDRONI FUEL CO | | | SCAC3 |
| 1962 | PDFC | PEDRONI FUEL CO | | | SCAC4 |
| 1963 | PDFD | PIEDMONT FORWARDING INC | | | SCAC4 |
| 1964 | PDFF | PDQ FAST FREIGHT INC | | | SCAC3 |
| 1965 | PDFI | P D FREIGHT SYSTEMS, INC | | | SCAC3 |
| 1966 | PDFL | PACIFIC DENSIFIED FUELS INC | | | SCAC3 |
| 1967 | PDFL | PROCESADOS DE FRUTAS Y LEGUMBRES S | | | SCAC4 |
| 1968 | PDFQ | P & D FREIGHT INC | | | SCAC4 |
| 1969 | PDFR | PDQ FREIGHT SYSTEMS INC | | | SCAC3 |
| 1970 | PDFS | PRODUCER FREIGHT SYSTEMS | | | SCAC3 |
| 1971 | PDFS | PDS FREIGHT SERVICES INC | | | SCAC4 |
| 1972 | PDFT | P & D FRUIT | | | SCAC4 |
| 1973 | PDG | PLM Dollar Group Limited | Callsign: Osprey, | GB | AVCODES |
| 1974 | PDG | PLM Dollar Group | | | ICAO1 |
| 1975 | PDGH | PRIEL, DOUG HOLDINGS INC | | | SCAC3 |
| 1976 | PDGN | POLARIS DESIGN | | | SCAC4 |
| 1977 | PDGX | The P.D. George Co. | 7/1935-4/1970; eliminated 7/1970 | | NAKINA |
| 1978 | PDGX | The P.D. George Co. | 4/38-4/70; eliminated 7/70 | | NRHS |
| 1979 | PDGX | P. D. GEORGE CO. | | | PWRC |
| 1980 | PDHA | P & D HEAVY HAULING & | | | SCAC4 |
| 1981 | PDHC | PACIFIC DOLPHIN NAVIGATION INC | | | SCAC4 |
| 1982 | PDHI | PRODUCE HAULERS INC | | | SCAC3 |
| 1983 | PDHR | P D H TRANSPORT INC | | | SCAC3 |
| 1984 | PDHT | PRIDGEN, HERMAN | | | SCAC3 |
| 1985 | PDI | Paradise Island Airlines, Inc. | Callsign: Paradise Island, | USA | AVCODES |
| 1986 | PDI | Air Paradise | Callsign: Coki, | PRI | AVCODES |
| 1987 | PDI | Paradise Island Airways | | | ICAO1 |
| 1988 | PDIA | PERISHABLE DISTRIBUTORS OF IOWA LTD | | | SCAC4 |
| 1989 | PDID | PHASE 3 DELIVERY INC | | | SCAC4 |
| 1990 | PDIH | PT DISTRIBUTION INC | | | SCAC4 |
| 1991 | PDII | PETRO-DIAMOND INCORPORATED | | | SCAC3 |
| 1992 | PDII | PRIORITY DISTRIBUTION INC | | | SCAC4 |
| 1993 | PDIJ | PACIFIC DREAM INC | | | SCAC4 |
| 1994 | PDIM | PERFORMANCE DELIVERIES INC | | | SCAC4 |
| 1995 | PDIN | PRIDE INTERMODAL INC | | | SCAC4 |
| 1996 | PDIP | POWER DISPATCH INC | | | SCAC4 |
| 1997 | PDIQ | P D I INC | | | SCAC3 |
| 1998 | PDIQ | PORT DISTRIBUTION INC | | | SCAC4 |
| 1999 | PDIT | PARKWAY TRANSPORT INC | | | SCAC3 |
| 2000 | PDIT | PARKWAY TRANSPORT INC | | | SCAC4 |
