| 1 | DIR | P.T. Dirgantara Air Services | IATA: AW, Callsign: Dirgantara, AOC withdrawn by authorities. Ceased operations. | RI | AVCODES |
| 2 | DIR | Dirgantara Air Service, PT. | Callsign: Dirgantara, | RI | AVCODES |
| 3 | DIR | Aerro Direkt S.r.l. | IATA: 4D, Callsign: Direkt Wings, | RO | AVCODES |
| 4 | DIR | Dirgantara Air Service | IATA: AW | | ICAO1 |
| 5 | DIR | DULUTH & IRON RANGE RR | | | PWRC |
| 6 | DIRD | DIRECT DISTRIBUTION | | | SCAC4 |
| 7 | DIRI | DIEHL RICHARD INCORPORATED | | | SCAC4 |
| 8 | DIRK | DIRECT TRANSFER INC | | | SCAC4 |
| 9 | DIRO | DX XPRESS INC (DIRECTO EXPRESS INC) | | | SCAC4 |
| 10 | DIRQ | DIRECT CARRIER SERVICES | | | SCAC4 |
| 11 | DIRU | DIRECTRIGHT CARTAGE 2001 INC | | | SCAC4 |
| 12 | DIRZ | DIAMOND SHAMROCK REFINERY | | | PWRC |
