| 3801 | DODG | DODGE MOVING & STORAGE CO INC | | | SCAC4 |
| 3802 | DODI | DIAMOND OFFSHORE DRILLING INC | | | SCAC4 |
| 3803 | DODL | DOMINION DEDICATED LOGISTICS INC | | | SCAC4 |
| 3804 | DODM | U.S. DEPARTMENT OF DEFENSE - MARINES | | | PWRC |
| 3805 | DODN | U.S. DEPARTMENT OF DEFENSE - NAVY | | | PWRC |
| 3806 | DODP | DOUBLE-D TRANSPORT INCORPORATED | | | SCAC4 |
| 3807 | DODU | MILITARY SURFACE DEPLOYMENT AND DISTRIBUTION COMMAND | | USA | BIC |
| 3808 | DODU | U.S. DEPARTMENT OF DEFENSE | | | PWRC |
| 3809 | DODU | United States Department of Defense | | | RSRV |
| 3810 | DODU | DEPARTMENT OF DEFENSE | | | SCAC4 |
| 3811 | DODW | DODSWORTH TRUCKING | | | SCAC4 |
| 3812 | DODX | Dept. of Defense, Military Traffic Management Command | added 10/1974; 1/1975-7/2005 | | NAKINA |
| 3813 | DODX | Dept. of Defense, Military Traffic Management and Terminal Service | added 10/1965; 10/1966-4/1970; eliminated 10/1974 | | NAKINA |
| 3814 | DODX | Dept. of Defense, Military Traffic Management and Terminal Service | added 10/65; 10/66-4/70 | | NRHS |
| 3815 | DODX | Dept. of Defense, Military Traffic Management Command | 1/75-7/2000 | | NRHS |
| 3816 | DODX | U.S. DEPARTMENT OF DEFENSE (DEPT. OF ARMY, MIL. TRAFFIC MGMT. COMMAND) | | | PWRC |
| 3817 | DODX | United States Department of Defense | | | RSRV |
| 3818 | DODX | DEPARTMENT OF DEFENSE | | | SCAC4 |
| 3819 | DODZ | U.S. DEPARTMENT OF DEFENSE | | | PWRC |
| 3820 | DODZ | United States Department of Defense | | | RSRV |
| 3821 | DODZ | US DEPT OF DEFENSE 20 FT CONT | | | SCAC3 |
| 3822 | DODZ | DEPARTMENT OF DEFENSE 20FT CHASSIS | | | SCAC4 |
| 3823 | DOE | U.S. DEPARTMENT OF ENERGY | | | PWRC |
| 3824 | DOEO | DORNS DELIVERY & TRANSFER INC | | | SCAC4 |
| 3825 | DOEX | The Doe Run Resources Corp d/b/a The Doe Run Co. | 7/2005 (not listed) | | NAKINA |
| 3826 | DOEX | DOE RUN RESOURCES CORP. d/b/a THE DOE RUN CO. | | | PWRC |
| 3827 | DOEX | Doe Run Resources Corporation | | | RSRV |
| 3828 | DOEX | DOE RUN COMPANY, THE | | | SCAC4 |
| 3829 | DOEZ | DORCHESTER ELEVATOR | | | PWRC |
| 3830 | DOFO | DEPARTMENT OF FISHERIES AND OCEANS | | | SCAC4 |
| 3831 | DOFW | DOMINION FIREWORKS INC | | | SCAC4 |
| 3832 | DOGN | DOG GONE TRUCKING INC | | | SCAC4 |
| 3833 | DOGU | Big Dog Containers | | | RSRV |
| 3834 | DOHL | DEMANKO HLC LOGISTICS INC | | | SCAC4 |
| 3835 | DOHO | Dorogi homokvasút | | H | TRAFFIC |
| 3836 | DOHOKU | Dohoku Bus Co. | | J | TRAFFIC |
| 3837 | DOI | U.S. Department of the Interior, Office of Aircraft Services | Callsign: Interior, | USA | AVCODES |
| 3838 | DOI | U.S. Department of the Interior | | | ICAO1 |
| 3839 | DOIB | DEARYBURY OIL CO INC | | | SCAC4 |
| 3840 | DOIC | D O INC | | | SCAC4 |
| 3841 | DOIE | DRISCOLL OIL INC | | | SCAC4 |
| 3842 | DOII | DRILCO INC | | | SCAC4 |
| 3843 | DOIL | DOOLEY OIL TRANSPORT INC | | | SCAC4 |
| 3844 | DOIO | DANFAIR OIL CO INC | | | SCAC4 |
| 3845 | DOIY | DOTS | | | SCAC4 |
| 3846 | DOJ | US Department Of Justice Prisoner & Alien Transportation Service (JPATS) | Callsign: Justice, ICAO Designator changed from JUD | USA | AVCODES |
| 3847 | DOJ | Justice Prisoner and Alien Transportation System | | | ICAO1 |
| 3848 | DOJM | DOJIMA MARINE CO LTD | | | SCAC4 |
| 3849 | DOK | Nordic Air Ambulance A/S | Callsign: Doctor, | DK | AVCODES |
| 3850 | DOKT | DOKTER TRUCKING CORP | | | SCAC4 |
| 3851 | DOL | Ebsco, Inc. d/b/a Million Air Longview | Callsign: Dollar Sign, | USA | AVCODES |
| 3852 | DOL | DOLIN LIMOUSINE SERVICE | | | SCAC4 |
| 3853 | DOLB | D-ONE LOGISTICS INC | | | SCAC4 |
| 3854 | DOLE | DISCOUNT OIL LLC | | | SCAC4 |
| 3855 | DOLF | DOLPHIN FORWARDING INC | | | SCAC4 |
| 3856 | DOLG | DOLLAR GENERAL CORP | | | SCAC4 |
| 3857 | DOLL | DOLLY TRANS FREIGHT CO INC | | | SCAC4 |
| 3858 | DOLM | DOOLITTLE LLC | | | SCAC4 |
| 3859 | DOLN | Döllnitzbahn | Real: DBG | A | TRAFFIC |
| 3860 | DOLP | DOLPHIN TRANSPORTATION CO | | | SCAC4 |
| 3861 | DOLQ | DOLE OCEAN CARGO | | | SCAC1 |
| 3862 | DOLQ | DOLE OCEAN CARGO | | | SCAC4 |
| 3863 | DOLR | DOT-LINE TRANSPORTATION | | | SCAC1 |
| 3864 | DOLR | DOT-LINE TRANSPORTATION | | | SCAC4 |
| 3865 | DOLT | DOLPHIN TANKER SRL | | | SCAC4 |
| 3866 | DOLU | DOLPHIN LINE SHIPPING LLC | | UAE | BIC |
| 3867 | DOLVA | DOLVAP, s.r.o. | | SK | VKM |
| 3868 | DOLW | DODD, LAWRENCE ALBERT | | | SCAC4 |
| 3869 | DOLWR | Dolnośląskie Przedsiębiorstwo Napraw Infrastruktury Komunikacyjnej DOLKOM Sp. z o.o. | | PL | VKM |
| 3870 | DOLX | Dolese Bros. Co. | added 7/1978; 1/1980-1/1994; eliminated 7/2000; 7/2000-7/2005 (not listed) | | NAKINA |
| 3871 | DOLX | Dolese Bros. Co. | added 7/78; 1/80-7/2000; eliminated 7/2000 | | NRHS |
| 3872 | DOLX | DOLESE BROS. COMPANY | | | PWRC |
| 3873 | DOLX | Dolese Brothers | | | RSRV |
| 3874 | DOLX | DOLESE BROS. COMPANY | | | SCAC4 |
| 3875 | DOM | Dos Mundos | Callsign: Dos Mundos, | DOM | AVCODES |
| 3876 | DOM | Domergue Aviation | Callsign: Dome Air, | F | AVCODES |
| 3877 | DOM | Dos Mundos | | | ICAO1 |
| 3878 | DOM | DELTA OIL MILL | | | PWRC |
| 3879 | DOMB | DOMINGUEZ, BLA | | | SCAC4 |
| 3880 | DOMC | DOMENICO TRANSPORTATION CO | | | SCAC4 |
| 3881 | DOMENICO | Domenico Bus Service | | US-NJ | TRAFFIC |
| 3882 | DOMF | DOMINICK FUEL INC | | | SCAC4 |
| 3883 | DOMN | DOMINION BULK INTERNATIONAL S A | | | SCAC4 |
| 3884 | DOMO | DOMINO TRANSPORTS INC | | | SCAC4 |
| 3885 | DOMV | DONS MOVING AND STORAGE | | | SCAC4 |
| 3886 | DOMX | Dothan Oil Mill Co. | 1/1941-10/1957; eliminated 7/1958 | | NAKINA |
| 3887 | DOMX | Dothan Oil Mill Co. | 1/52-10/57; eliminated 7/58 | | NRHS |
| 3888 | DOMX | DOTHAN OIL MILL CO. | | | PWRC |
| 3889 | DOMY | DOMINGUEZDRAYAGE | | | SCAC4 |
| 3890 | DON | Donair Flying Club Ltd. | Callsign: Donair, | GB | AVCODES |
| 3891 | DON | Donair Flying Club | | | ICAO1 |
| 3892 | DONA | DONS CAR CRUSHING | | | SCAC4 |
| 3893 | DONAU | DONAU CHEM SRL | | RO | VKM |
| 3894 | DONCT | Doncaster Corporation Transport | | GB | TRAFFIC |
| 3895 | DONE | DONNELLY, D INC | | | SCAC4 |
| 3896 | DONF | DON'S FROZEN EXPRESS, INC | | | SCAC1 |
| 3897 | DONG | DONS TRUCKING INC | | | SCAC4 |
| 3898 | DONGBU | Dongbu Tour | | USA | TRAFFIC |
| 3899 | DONI | DENISON OHIO NORTHERN | | | SCAC4 |
| 3900 | DONI | | City: Donietsk | UA | TRAFFIC |
