| 5001 | DSSD | DECOR STONE S DE RL MI | | | SCAC4 |
| 5002 | DSSH | DRIVE STAR SHUTTLE SYSTEMS | | | SCAC4 |
| 5003 | DSSI | DESTINATION SHUTTLE SERVICES LLC | | | SCAC4 |
| 5004 | DSSN | DOCS SURE SHOT TRANSPORTATION SERVI | | | SCAC4 |
| 5005 | DSSO | DOLPHIN SHIPOWNER S A | | | SCAC4 |
| 5006 | DSSP | DRESSLER TRANSPORTATION, INC | | | SCAC1 |
| 5007 | DSSR | D&S TRANSPORT | | | SCAC1 |
| 5008 | DSSS | DISTRIBUTION SOLUTIONS LLC | | | SCAC4 |
| 5009 | DSST | DSS TRUCKING INC | | | SCAC4 |
| 5010 | DSSU | PT INDONESIA GUANG CHING NICKEL AND STAINLESS STEEL IND | | RI | BIC |
| 5011 | DSSV | DESCHAINE SANITATION SERVICE | | | SCAC4 |
| 5012 | DSSX | The Detroit Salt Co. | added 1/2007 | | NAKINA |
| 5013 | DSSX | The Detroit Salt Co., L.C. | 7/2000-7/2005 (not listed) | | NAKINA |
| 5014 | DSSX | The Detroit Salt Co., L.C. | Jul-00 | | NRHS |
| 5015 | DSSX | DETROIT SALT COMPANY, LC | | | PWRC |
| 5016 | DSSX | Detroit Salt | | | RSRV |
| 5017 | DSSX | DETROIT SALT COMPANY LC, THE | | | SCAC4 |
| 5018 | DST | Aex Air, Inc. | Callsign: Desert, | USA | AVCODES |
| 5019 | DST | S.A.T. Fluggesellschaft mbH | IATA: JO, Callsign: Joker, Name changed to Germania Fluggesellschaft. ICAO designator changed to GFG | D | AVCODES |
| 5020 | DST | Star Aviation S.p.A. | Callsign: Star Aviation, Subsidary of RedMed-Group. | DZ | AVCODES |
| 5021 | DST | Aex Air | | | ICAO1 |
| 5022 | DSTB | DESIGN TRANSPORTATION, INC | | | SCAC1 |
| 5023 | DSTB | DST TRUCKING | | | SCAC4 |
| 5024 | DSTC | DEARBORN DISTRIBUTION SERVICES | | | SCAC4 |
| 5025 | DSTG | DADDY & SON TRUCKING LLC | | | SCAC4 |
| 5026 | DSTH | DIXON, SCOTT TRUCKING | | | SCAC4 |
| 5027 | DSTI | DESTINATION TRUCKING INC | | | SCAC4 |
| 5028 | DSTK | D & S TRUCKING | | | SCAC4 |
| 5029 | DSTL | DOSATECH LOGISTICS LC | | | SCAC4 |
| 5030 | DSTO | D-STAR TRANSPORTATION | | | SCAC4 |
| 5031 | DSTP | DELGADO & SONS TRANSPORTATION | | | SCAC4 |
| 5032 | DSTS | D & S TRANSPORTS INC | | | SCAC4 |
| 5033 | DSTT | DIST-TRANS CO | | | SCAC1 |
| 5034 | DSTT | DIST-TRANS CO | | | SCAC4 |
| 5035 | DSTU | DMS S.R.O. | | CZ | BIC |
| 5036 | DSTU | DMS S R O | | | SCAC4 |
| 5037 | DSTV | DST SPECIAL SERVICES INC | | | SCAC4 |
| 5038 | DSTW | DREES TRANSPORTATION INC | | | SCAC4 |
| 5039 | DSTY | DESTINY TRANSPORTATION INC | | | SCAC4 |
| 5040 | DSU | Delta State University | Callsign: Delta State, | USA | AVCODES |
| 5041 | DSU | Delta State University | | | ICAO1 |
| 5042 | DSUC | DRAGON SPORTS USA INC | | | SCAC4 |
| 5043 | DSUI | DOF SUBSEA USA INC | | | SCAC4 |
| 5044 | DSUK | DISS TRUCKING | | | SCAC1 |
| 5045 | DSUN | DESERT SUN MOVING SERVICES INC | | | SCAC4 |
| 5046 | DSUR | D-SCHURR EXPRESS INC | | | SCAC4 |
| 5047 | DSV | Direct Aero Services | | RO | AVCODES |
| 5048 | DSVB | DIAMOND SEVEN EXPRESS | | | SCAC4 |
| 5049 | DSVC | DAVCO SERVICES | | | SCAC4 |
| 5050 | DSVH | DIAZ SALAZAR, VICTOR HUMBERTO | | | SCAC4 |
| 5051 | DSVL | DESOUSA OIL & SERVICE CORP | | | SCAC4 |
| 5052 | DSVN | DIEMOULD SERVICE COMPANY (CANADA) L | | | SCAC4 |
| 5053 | DSVP | DSV EXPRESS INC | | | SCAC4 |
| 5054 | DSVT | DSV TRANSPORT INC | | | SCAC4 |
| 5055 | DSVU | DSV HAVA VE DENIZ TASIMACILIK A.S. | | TR | BIC |
| 5056 | DSVY | DUPLIN AUTO SALVAGE AND RECYCLING L | | | SCAC4 |
| 5057 | DSW | Deering Southwestern Ry. | 7/1923 | | NAKINA |
| 5058 | DSW | Deering Southwestern Ry. | 23-Jul | | NRHS |
| 5059 | DSW | DEERING SOUTHWESTERN RWY. | | | PWRC |
| 5060 | DSWC | DT SWISS INC | | | SCAC4 |
| 5061 | DSWI | DAVES WAY INC | | | SCAC4 |
| 5062 | DSWN | DSW INC | | | SCAC4 |
| 5063 | DSWS | D S WHITFORD TRUCK SYS LTD | | | SCAC4 |
| 5064 | DSXC | DIS TRANSPORTATION LLC | | | SCAC4 |
| 5065 | DSXE | DTS XPRESS | | | SCAC4 |
| 5066 | DSXL | D.S.T. EXPRESS LLC | | | SCAC4 |
| 5067 | DSXN | DONLEY & SONS TRANSPORTATION | | | SCAC4 |
| 5068 | DSXS | DORUS TRANS LLC | | | SCAC4 |
| 5069 | DSXT | D & S TRANSIT LLC | | | SCAC4 |
| 5070 | DSXX | East Carbon Development Co. | added 7/2007 | | NAKINA |
| 5071 | DSXX | EAST CARBON DEVELOPMENT CO. | | | PWRC |
| 5072 | DSXX | EAST CARBON DEVELOPMENT COMPANY | | | SCAC4 |
| 5073 | DSY | DIESEL SUPPLY | | | PWRC |
| 5074 | DSYC | DART SUPPLY CHAIN SOLUTIONS INC | | | SCAC4 |
| 5075 | DSYK | DELSYK INDUSTRIES INC | | | SCAC4 |
| 5076 | DSYT | DAISY TOURS AND CONVENTIONS INC | | | SCAC4 |
| 5077 | DSZO | Dopravní společnost Zlín-Otrokovice, s.r.o. | City: Zlín | CZ | TRAFFIC |
| 5078 | DSZU | BSL CONTAINERS LIMITED | | HK | BIC |
| 5079 | DT | Decatur Junction Ry. Co. | 1/1994-7/2005 (not listed) | | NAKINA |
| 5080 | DT | Detroit Terminal R.R. Co. | 8/1920-10/1966 & 1/1975-1/1980; eliminated 1/1982 | | NAKINA |
| 5081 | DT | Detroit Terminal R.R. Co. | 7/23-10/66 & 1/75-1/80; eliminated 1/82 | | NRHS |
| 5082 | DT | Decatur Junction Ry. Co. | 1/94-7/2000 | | NRHS |
| 5083 | DT | DECATUR JUNCTION RAILWAY COMPANY [DETROIT TERMINAL RR] | | | PWRC |
| 5084 | DT | Decatur Junction Railway | | | RSRV |
| 5085 | DT | DECATUR JUNCTION RAILWAY | | | SCAC4 |
| 5086 | DT | Detroit Terminal R.R. Co. | | USA | TRAFFIC |
| 5087 | DT&I | Detroit, Toledo & Ironton R.R. (Co.) | 8/1920-10/1966 | | NAKINA |
| 5088 | DT&I | Detroit, Toledo & Ironton R.R. Co. | 23-Jul | | NRHS |
| 5089 | DT&I | Detroit, Toledo & Ironton R.R. | 4/38-10/66 | | NRHS |
| 5090 | DT&I | CANADIAN NATIONAL RAILWAY [GRAND TRUNK WESTERN RR; DETROIT, TOLEDO & IRONTON] | | | PWRC |
| 5091 | DTA | TAAG Angola Airlines | IATA: DT | | ICAO1 |
| 5092 | DTA | Dartford Tunnel Authority | | GB | TRAFFIC |
| 5093 | DTAA | D C T TRANSPORT INC | | | SCAC4 |
| 5094 | DTAB | DOBSON TRUCKING | | | SCAC4 |
| 5095 | DTAI | DIANAS IMPORTS INC | | | SCAC4 |
| 5096 | DTAO | DAVIS INDUSTRIES INC | | | SCAC4 |
| 5097 | DTAQ | DRACO TRUCKING | | | SCAC4 |
| 5098 | DTAR | DOUCETTES BOATBUILDING LTD | | | SCAC4 |
| 5099 | DTAS | DATA SALES CO INC | | | SCAC4 |
| 5100 | DTAT | DELTA TRANSPORTATION | | | SCAC4 |
