| 1 | DAT | Delta Air Transport N.V. | IATA: SN, Callsign: Deltair, IATA Prefix: 082, Name changed to SN Brussels Airlines. IATA designator changed from QG, ICAO designator changed from DAT | B | AVCODES |
| 2 | DAT | Delta Air Transport (D.A.T.) | IATA: QG, Callsign: Deltair, IATA designator changed to SN, ICAO designator changed to SAB | B | AVCODES |
| 3 | DAT | Delta Air Transport N.V. d/b/a SN Brussels Airlines | IATA: SN, Callsign: Estail, IATA Prefix: 082, Name changed from Delta Air Transport N.V. w.e.f. 15 February 2002. IATA designator changed from QG, ICAO designator changed from DAT | B | AVCODES |
| 4 | DAT | Delta Air Transport (D.A.T.) | IATA: DE, Callsign: Deltair, IATA designator changed to QG | B | AVCODES |
| 5 | DAT | Delta Air Transport N.V. t/a Brussels Airlines | IATA: SN, Callsign: Estail, IATA Prefix: 082, Name changed from Delta Air Transport N.V. d/b/a SN Brussels Airlines. IATA designator changed from QG, ICAO designator changed from DAT | B | AVCODES |
| 6 | DAT | Brussels Airlines N.V. | IATA: SN, Callsign: Estail, IATA Prefix: 082, ICAO Desginator changed to BEL. Name changed from Delta Air Transport N.V. t/a Brussels Airlines. IATA designator changed from QG, ICAO designator changed from DAT | B | AVCODES |
| 7 | DAT | Brussels Airlines N.V. | IATA: SN, Callsign: Bee-Line, IATA Prefix: 082, ICAO Desginator changed to BEL. Name changed from Delta Air Transport N.V. t/a Brussels Airlines. IATA designator changed from QG, ICAO designator changed from DAT | B | AVCODES |
| 8 | DAT | Dart Limited Trust Distribution | IATA: D4, Callsign: Dartlimited, Suspended operations during February 2018. Assets requested to be transferred to new airline called LLC Alanna. | UA | AVCODES |
| 9 | DAT | 1263343 Alberta Inc t/a Enerjet | IATA: Y9, Callsign: Dauntless, Name changed to 1263343 Alberta Inc t/a Lynx Air. | CDN | AVCODES |
| 10 | DAT | 1263343 Alberta Inc t/a Lynx Air | IATA: Y9, Callsign: Dauntless, Name changed from 1263343 Alberta Inc t/a Enerjet. | CDN | AVCODES |
| 11 | DAT | Brussels Airlines | IATA: SN | | ICAO1 |
| 12 | DATA | D-A TRANSPORTATION COMPANY LLC | | | SCAC4 |
| 13 | DATB | D & A TRANSPORT | | | SCAC4 |
| 14 | DATD | DOUBLE A TRANSPORT LLC | | | SCAC4 |
| 15 | DATF | DUPASQUIER, ANDRE TRUCKING | | | SCAC4 |
| 16 | DATG | DALES TRUCKING | | | SCAC4 |
| 17 | DATH | DALOR TRANSIT INC | | | SCAC4 |
| 18 | DATI | DAILY-SELECT (DIVISION OF TFI TRANS | | | SCAC4 |
| 19 | DATK | DAVIS EXPRESS INC | | | SCAC4 |
| 20 | DATN | D & A TRUCKING | | | SCAC4 |
| 21 | DATT | DAT TRUCKING | | | SCAC4 |
| 22 | DATU | DART CONTAINER LINE INC. | | | PWRC |
| 23 | DATU | Dart Container Line | | | RSRV |
| 24 | DATW | D & A TRANSPORT | | | SCAC4 |
| 25 | DATX | DATX Associates | added 7/1985; 1/1994-7/2005 | | NAKINA |
| 26 | DATX | DATX Associates | 1/94-7/2000 | | NRHS |
| 27 | DATX | DATX ASSOCIATES | | | PWRC |
| 28 | DATX | DATX Associates | | | RSRV |
| 29 | DATX | DATX ASSOCIATES | | | SCAC4 |
| 30 | DATZ | DATSUN | | | PWRC |