| Prefixo | Organização | Intenção | Site da Internet | Contato | Inscrito |
|---|---|---|---|---|---|
| QA | Querry and Associates, Inc. | Reserved | Bill Querry | 24-Jul-1999 | |
| QDB | IHSoftware | QuickDataBase | home.sprynet.com/~rrm/ | Robert R. Marsh, SJ | 08-Apr-1999 |
| Qom | Qompas Decision Tools | www.qompas.nl | Remco Kapinga | 26-Aug-2001 | |
| QR | QuSoft AS | Quick Report; Reporting | www.qusoft.com | Allan Lochert | 19-Mar-1999 |
| QR | Soft Sector, Inc. | ssBarCode; BarCoding | www.digital-metaphors.com/ | 30-Dec-1899 | |
| QRD | THSD | Qrdesign; Reporting | www.thsd.de | Timo Hartmann | 30-Dec-1899 |
| QS | Questa Software Systems Inc. | Reserved; Reserved | www.questasoftware.com | Jean Junker, | 16-Jul-1998 |
| QSR | Quasar Technology Pty Ltd | Reserved | www.quasar.net.au | Jonathon Desmond | 22-Jun-1999 |
| QT | Container Becker | QuickTOOLS | Frank Demmig | 23-Jun-1999 | |
| QU | QUMAS Corporation | RESERVED; RESERVED | www.qumas.com | Paul Hanover | 01-Feb-1999 |
| QX | coax | Various components | www.coaxnet.com/delphi | Cem Atiklar | 03-Apr-1999 |