| 1 | IDA | PT. Indonesia Air Transport. Tbk | IATA: I7, Callsign: Intra, Designator I7 recalled by IATA. | RI | AVCODES |
| 2 | IDA | PT. Indonesia Air Transport. Tbk | Callsign: Intra, Designator I7 recalled by IATA. | RI | AVCODES |
| 3 | IDA | Indonesia Air Transport | | | ICAO1 |
| 4 | IDAC | Idaho Central Railroad (Boise Pacific Railroad) | | | RSRV |
| 5 | IDAD | INTERSTATE DELIVERY SYSTEMS | | | SCAC4 |
| 6 | IDAL | IDEAL CARTAGE, INC | | | SCAC1 |
| 7 | IDAX | Industria del Alcali, S.A. | added 4/1974; 1/1975-1/1980; eliminated 1/1984; 1/1994 (not listed) | | NAKINA |
| 8 | IDAX | Industria del Alcali, S.A. | added 4/74; 1/75-1/94 | | NRHS |
| 9 | IDAX | INDUSTRIA DEL ALCCALI SA | | | PWRC |
| 10 | IDAX | Industria del Alcali | | | RSRV |
