| 1801 | DFGB | DANGON FREIGHT SYSTEM INC | | | SCAC4 |
| 1802 | DFGL | DELTA FREIGHT SYSTEMS LLC | | | SCAC4 |
| 1803 | DFGZ | DEWEY FISHER GRAIN | | | PWRC |
| 1804 | DFHR | DYNAMIC FREIGHT HAULERS | | | SCAC4 |
| 1805 | DFHT | DFH TRANSPORTATION LLC | | | SCAC4 |
| 1806 | DFIB | DIVERSIFIED FREIGHT INC | | | SCAC4 |
| 1807 | DFII | D F INDUSTRIES INC | | | SCAC4 |
| 1808 | DFIK | DIARIES FILMS INC | | | SCAC4 |
| 1809 | DFIN | DOMESTIC FREIGHTWAYS INC | | | SCAC4 |
| 1810 | DFIQ | DEKTOR FILM INC | | | SCAC4 |
| 1811 | DFIR | DARCH FIRE INCORPORATED | | | SCAC4 |
| 1812 | DFIS | DROST FARMS INC | | | SCAC4 |
| 1813 | DFIU | VENTURA TRADING LTD | | BM | BIC |
| 1814 | DFIU | DOLE FRESH FRUIT INTERNATIONAL LTD | | | SCAC4 |
| 1815 | DFIX | Weyerhauser Co., Dierks Division | added 4/1972; added 7/1973 | | NAKINA |
| 1816 | DFIX | Weyerhauser Co., Dierks Division | added 4/72; added 7/73 | | NRHS |
| 1817 | DFIX | WEYERHAUSER CO., DIERKS DIV. | | | PWRC |
| 1818 | DFJI | DESROSIERS, FERME J INC | | | SCAC4 |
| 1819 | DFJO | DISENO FORJADO | | | SCAC4 |
| 1820 | DFJU | MS LOGISTICS LTD. | | GB | BIC |
| 1821 | DFL | Scandinavian Medicopter AB | Callsign: Mediflight, Name changed to Babcock Scandinavian AirAmbulance AB. | S | AVCODES |
| 1822 | DFL | Babcock Scandinavian AirAmbulance AB | Callsign: Mediflight, Name changed from Scandinavian Medicopter AB. | S | AVCODES |
| 1823 | DFLB | DFW FREIGHT LINES LLC | | | SCAC4 |
| 1824 | DFLC | DEFLEX COMPOSITE INC | | | SCAC4 |
| 1825 | DFLD | DECHANT FARMS LTD | | | SCAC4 |
| 1826 | DFLG | D F LOGISTICS INC | | | SCAC4 |
| 1827 | DFLI | DOVE FREIGHT LINES INC | | | SCAC4 |
| 1828 | DFLL | DIRECT FREIGHT LLC | | | SCAC4 |
| 1829 | DFLN | DUPUIS, FRANK LANDSCAPING & TRUCKIN | | | SCAC4 |
| 1830 | DFLO | DART FUEL OIL INC | | | SCAC4 |
| 1831 | DFLQ | D FOUR (D4) LOGISTICS INC | | | SCAC4 |
| 1832 | DFLS | DANCE FREIGHT LINES INC | | | PWRC |
| 1833 | DFLU | RLS “DFI TERMINAL” | | RUS | BIC |
| 1834 | DFLU | JSC DIALOG FREIGHT INTERNATIONAL | | | SCAC4 |
| 1835 | DFMC | DICKMAN FARMS LLC | | | SCAC4 |
| 1836 | DFMD | DOBSON FLEET MANAGEMENT LTD | | | SCAC4 |
| 1837 | DFMG | DIRECT FLEET | | | SCAC4 |
| 1838 | DFMI | DAVIS FREIGHT MANAGEMENT INC | | | SCAC4 |
| 1839 | DFMV | DEDICATED FREIGHT MANAGEMENT (VAN D | | | SCAC4 |
| 1840 | DFND | DEFINED LOGISTICS SOLUTIONS INC | | | SCAC4 |
| 1841 | DFOM | DELTA FUELS OF MICHIGAN | | | SCAC4 |
| 1842 | DFOR | DRIVING FORCE DECKS INTERNATIONAL L | | | SCAC4 |
| 1843 | DFOU | FLORENS ASSET MANAGEMENT COMPANY LIMITED | | HK | BIC |
| 1844 | DFOU | DONG FANG INTERNATIONAL INVESTMENT | | | SCAC4 |
| 1845 | DFQD | DSV AIR & SEA INC | | | SCAC4 |
| 1846 | DFRA | DAUPHINAIS, FRANCOIS | | | SCAC4 |
| 1847 | DFRG | DEFFENBAUGH RECYCLING COMPANY LLC | | | SCAC4 |
| 1848 | DFRH | DIMARE FRESH INC | | | SCAC4 |
| 1849 | DFRI | DURA FREIGHT LINES, INC | | | SCAC1 |
| 1850 | DFRI | DURA FREIGHT LINES | | | SCAC4 |
| 1851 | DFRL | DFR LOGISTICS INC | | | SCAC4 |
| 1852 | DFRM | DICIOCCO FARMS EXPRESS LTD | | | SCAC4 |
| 1853 | DFRN | DEAD FLY RACING | | | SCAC4 |
| 1854 | DFRP | DUFOUR PETROLEUM | | | SCAC4 |
| 1855 | DFS | Dwyer Aircraft Sales, Inc. | Callsign: Dwyair, | USA | AVCODES |
| 1856 | DFS | Dwyer Aircraft Services | | | ICAO1 |
| 1857 | DFS | Dampfbahn Fränkische Schweiz e.V. | Ebermannstadt | D | privat-bahn.de |
| 1858 | DFS | Dampfbahn Fränkische Schweiz e.V | | DE | VKM |
| 1859 | DFSA | DAKOTA FARM SERVICE | | | SCAC4 |
| 1860 | DFSC | DELTAMAX FREIGHT SYSTEM CHICAGO | | | SCAC4 |
| 1861 | DFSD | DEDICATED FLEET SYSTEMS SPECIAL COM | | | SCAC4 |
| 1862 | DFSF | DEPOT FARM SUPPLY INC | | | SCAC4 |
| 1863 | DFSG | DEPENDABLE FREIGHT SERVICES | | | SCAC4 |
| 1864 | DFSH | DIAMOND FREIGHT SYSTEMS | | | SCAC4 |
| 1865 | DFSJ | DAVIS FUEL SERVICE INC | | | SCAC4 |
| 1866 | DFSL | DIPLOMAT FLIGHT SERVICES LLC | | | SCAC4 |
| 1867 | DFSO | DAIRY FEED SOLUTIONS LLC | | | SCAC4 |
| 1868 | DFSR | D F S DICARLO FOOD SERVICE | | | SCAC4 |
| 1869 | DFSS | DANFREIGHT SYSTEMS INC | | | SCAC4 |
| 1870 | DFSU | FLORENS ASSET MANAGEMENT COMPANY LIMITED | | HK | BIC |
| 1871 | DFSU | DONG FANG INTERNATIONAL | | | SCAC4 |
| 1872 | DFSW | DAVIS FARM & SAWMILL | | | SCAC4 |
| 1873 | DFT | Skydrift Aircharter Limited | Callsign: Skydrift, | GB | AVCODES |
| 1874 | DFTG | DRAKE FARMS TRUCKING INC | | | SCAC4 |
| 1875 | DFTI | DOWNS FUEL TRANSPORT INC | | | SCAC4 |
| 1876 | DFTK | DIRECT FUEL TRANSPORT LLC | | | SCAC4 |
| 1877 | DFTN | DEVINE FUEL TRANSPORTS INC | | | SCAC4 |
| 1878 | DFTQ | DIRECT FUEL TRANSPORT INC | | | SCAC4 |
| 1879 | DFTR | DRIFTERS EXPRESS | | | SCAC4 |
| 1880 | DFTX | DTE Coal Services | added 4/2009 | | NAKINA |
| 1881 | DFTX | DTE Coal Services, Inc. | added 7/2001; eliminated 1/2009 | | NAKINA |
| 1882 | DFTX | DTE Transportation Services, Inc. | 7/2000 (not listed); 7/2005 | | NAKINA |
| 1883 | DFTX | DTE Transportation Services, Inc. | Jul-00 | | NRHS |
| 1884 | DFTX | DTE Coal Services, Inc. | added 7/2001 | | NRHS |
| 1885 | DFTX | DTE TRANSPORTATION SERVICES, LTD. (DTE COAL SERVICES, INC.) | | | PWRC |
| 1886 | DFTX | DTE Transportation Services | | | RSRV |
| 1887 | DFTX | DTE COAL SERVICES INC | | | SCAC4 |
| 1888 | DFUL | DARIEN FUEL CO INC | | | SCAC4 |
| 1889 | DFVS | DRAKE FREIGHT SERVICES | | | SCAC4 |
| 1890 | DFVU | DESAI FRUITS VENTURE PRIVATE LTD | | IND | BIC |
| 1891 | DFWE | DFW EXPRESS LLC | | | SCAC4 |
| 1892 | DFWN | DFW HOT SHOT INC | | | SCAC4 |
| 1893 | DFWQ | DFW LINQ TRANSPORT INC | | | SCAC4 |
| 1894 | DFWT | DFW TRANSIT | | | SCAC4 |
| 1895 | DFWU | DFW UNIVERSAL DEPOT | | USA | BIC |
| 1896 | DFX | Dylan Flight Service, S.A. | Callsign: Dylan Flight, | CH | AVCODES |
| 1897 | DFXT | DESERT FOX TRUCKING LLC | | | SCAC4 |
| 1898 | DFYS | DYNAMO FLETES Y SERVICIOS SA DE CV | | | SCAC4 |
| 1899 | DG | Air Atlantique (General Aviation Services Ltd.) | ICAO: AAG, Callsign: Atlantic, Designator DG recalled by IATA | GB | AVCODES |
| 1900 | DG | Air Provence International | ICAO: APR, Callsign: Air Provence, IATA designator changed to P3 | F | AVCODES |
