| Prefix | Organization | Purpose | Web Site | Contact | Registered |
|---|---|---|---|---|---|
| R | RCAI | Reserved; Reserved | www.rcai.demon.co.uk/ | Rafe Aldridge | 19-Mar-1999 |
| r3 | reBoot systems | (all components) | Sebastian Busch | 05-Jan-2000 | |
| RA | LeeBen Ltd | Reserved | Roy Andrews | 29-Jun-1999 | |
| RAC | RACsoft | RAC | home.introweb.nl/~blue015 | ROB A.C. van Bezouwen | 03-Nov-1999 |
| RAD | Inthink Corporation | RAD Objects; Toolkit | www.inthink.com | Julie Larson | 06-Jun-1998 |
| RAS | Alexander Rodigin | TrasOneInstComp | www.torry.ru | Alexander Rodigin | 05-Nov-1999 |
| RAV | Electra | reserved | Alex Rezhko | 01-Mar-2000 | |
| RAY | Innovation Software | reserved | Raymond Cheung | 07-Jun-1999 | |
| RB | Tamarack Associates | Rubicon; Search Engine | www.tamaracka.com | Deven Hickingbotham | 13-Jun-1998 |
| rb | Multimedia Player | Robery Mircea | 14-Sep-2001 | ||
| RBG | BG NetSoft | Reserved | Brad Gies | 11-Jun-2000 | |
| rbt | Jaros³aw Smyczyñski | 04-Nov-2003 | |||
| rbt | RABBIT | StatusBar | Jaros³aw Smyczyñski | 12-Feb-2004 | |
| RBW | U.S. Geological Survey | Reserved | water.usgs.gov/nrp/gwsoftware/ | Richard B Winston | 21-Jul-1999 |
| RC | AMORC Services Limited | Reserved; Reserved | Kashif Saeed | 01-Feb-1999 | |
| RCA | RCA Software e Servicos Ltda | www.rcasoft.com.br | Ricardo Alves | 10-Jun-2000 | |
| RCK | people.a2000.nl/rkapinga | Remco Kapinga | 25-Mar-2000 | ||
| RCK | Repelsteeltjes Softwarehouse | Remco | 26-Aug-2001 | ||
| RCS | ResCorSoft | Reserved | www.rescorsoft.com | Luke Miller | 31-Dec-2001 |
| RCT | Eagle Software Inc | ReAct; Component Develop | www.eagle-software.com | mark miller | 27-Apr-1998 |
| RD | Rowdy Dog Software | Rowdy Dog Delphi Components | Brian Cook | 07-Feb-2000 | |
| RD | Realm Digital | www.realmdigital.co.za | Wesley Lynch | 12-Jun-2000 | |
| RDB | The Graphical Gnome | UDDF; Graphics | www.gnomehome.demon.nl/uddf/index.htm | Rob den Braasem | 28-Apr-1998 |
| RDL | reserved | Ron Lyon | 11-Dec-1999 | ||
| REG | FJE Consulting | Reserved; Reserved | www.teleport.com/~fedberg/index.htm | Fred Edberg | 19-Mar-1999 |
| REL | Reliable Soft | Reserved | www.reliable.com.ar | Matías Gorfinkiel/Gustavo Elía | 13-Jun-1999 |
| REX | InfoSoft Systems | TRexChem; Forensic Science | Richard Bateman | 30-Aug-1998 | |
| RF | RF Software | Various | Rolf Frei | 20-Oct-1999 | |
| RGS | RGS Component Pack | my.tele2.ee/rereeda/delphi | Tõnis Argus | 27-Apr-2000 | |
| RH | PDT | - reserved - | Richard Hohm | 29-Apr-1999 | |
| RHC | Robert Harvey Consulting | RhcRegComp, RhcLabel | www.findme.co.uk/delphi/ | Robert Harvey | 06-Jun-1999 |
| RHM | Oce Ceska republika | Reserved | Radim H. Mik | 24-Jun-1999 | |
| RHT | RunningHorse Technologies | Reserved; Reserved | F D Weller | 01-Feb-1999 | |
| RID | TRI-I Engineering, Inc. | RIDComp, RIDComp3, RIDCompX, T | www.iii-eng.com | Sam Conn | 21-Apr-1999 |
| RIK | Visionsoft Limited | Various | www.visionsoft.co.uk | Rik Barker | 30-Jul-1999 |
| Rish | rish | Reserved | www.rish.demon.nl | Rod Rishworth | 16-Aug-1999 |
| RJH | RjH Software | Reserved | www.rjhsoftware.com | Robert James | 27-Feb-2000 |
| RK | DesLine | RKPrintPreview; PixelGrahpics | geocities.com/SiliconValley/Haven/1415/ | Ruud Koortens | 01-Feb-1999 |
| RK | Ray Konopka | Sample Components | www.raize.com/DevTools | Ray Konopka | 28-Apr-1998 |
| RKA | RoKa Inc. | Robert Michaelson | 05-Jul-2000 | ||
| RKL | Pixel Productions | www.dallas.net/~leahey | Robert Leahey | 25-Jun-1999 | |
| RKM | ARKEMM Software Limited | Various | www.arkemm.com | Mark Brindle | 05-Mar-2008 |
| RKN | RKN Consulting Services | reserved | Rodney K. Nicholls | 01-Oct-1999 | |
| RL | RL Technology | ProgressBar; RL Component Suite | fastrom.da.ru | Fastrom | 15-Apr-1999 |
| rl6 | Snowball's Chance | RL6 Component Framework | Terry Robinson | 20-Jul-2003 | |
| RLB | Showball's Chance | RLB Component Framework | Terry Robinson | 26-Jul-2003 | |
| RM | Mills Enterprise | Reserved | Ryan Mills | 06-Apr-1999 | |
| rm | Softfire technologies | reserved | www.softfire.com | Randall P. Muir | 19-Aug-2000 |
| RM | Synactis | ReportMaker / DataSurfer | www.synactis.com | Philippe Gendrot | 06-Mar-2002 |
| RMB | Randy Bratton | reserved | Randy Bratton | 10-May-1999 | |
| RND | RNDesign Systems | various | www.mtco.com/~ctooley/Index.html | Curtis W. Tooley | 02-Jul-1999 |
| RND | RNDesign Systems | Color Notebook | www.mtco.com/~ctooley/Index.html | Curtis W. Tooley | 03-Aug-1999 |
| RNK | Robert Kozak | Reserved; Reserved | Robert Kozak | 01-Feb-1999 | |
| RO | RAD Only | Various components | www.radonly.com | Alex Danvy | 26-Jul-2001 |
| ROB | Robert Bala | Reserved | Robert Bala | 03-Jul-1999 | |
| ROI | ROI Systems Inc. | MANAGE 2000; Enterprise Resource | www.roisysinc.com | Doug Farmer | 06-Jun-1998 |
| ROS | Rosin and Associates Software | www.rosinsoft.com | Scott Alan Rosin | 12-Apr-2006 | |
| rox | reserved | www.roxville.net/projects/index.htm | Kirk Davies | 20-Jul-2003 | |
| RP | Nevrona Designs | ReportPrinter Pro | www.nevrona.com | Jim Gunkel | 18-Jul-1999 |
| RPL | R-Plus | R-Plus | www.rplus.co.uk | Rob Wilson | 01-Feb-1999 |
| RPL | Tempest Software | Hidden Paths; Toolkit | www.tempest-sw.com | Ray Lischner | 30-Dec-1899 |
| RPM | Extended Systems | TrpmProcedure | solutions.advantagedatabase.com | Dean Mikel | 08-Jun-1999 |
| RR | Robert Rossmair | TRRFirFilter; Reserved | home.t-online.de/home/Robert.Rossmair/ | Robert Rossmair | 19-May-1998 |
| RRS | Roadrunner Software | Control Grid | Philippe Galia | 28-Jul-1999 | |
| RS | Realsoft | Real Controls; Toolkit | www.realsoftdev.com | Dan English | 30-Dec-1899 |
| RSC | Reserved | www.ipost.net/rcampbell | Ryan Campbell | 28-Jul-1999 | |
| RSD | RSD Software | RSD Components; Toolkit | www.rsdsoftware.com | Roman Eremin | 27-Apr-1998 |
| RSI | RusSte, Inc. | RusSte Programmers Collection; Developers' ToolKit | Lawrence R. Steeger | 03-Jun-1998 | |
| RSL | RubyStone Software Limited | Reserved | Ephraim Rubenstein | 03-Nov-1999 | |
| rsm | Rimrock Software | Various | www.rimrocksoftware.com | Michael Burton | 14-Jun-2000 |
| RSP | PUGDOG Enterprises, Inc. | Reserved | 30-Dec-1998 | ||
| RST | Compahelen Ent. | Reserved | Aleksandr Kamyshan | 09-Nov-1999 | |
| RSX | Ross Smith | RSXDateTime RSXDBDateTime, etc | Ross Smith | 08-Aug-2000 | |
| RSZ | Real Systems | RAD toolkit | www.realsystems.co.za | Steve Mabbutt | 28-Sep-1999 |
| RT | Romtree Pty Ltd | MultiSelect; Package | www.romtree.com.au | Andrew Lush | 01-Jul-1998 |
| RT | Trusler Software Consortium | Gradient Worlds | www.trusler.com | Ross Trusler | 21-Jul-1999 |
| RTT | Runtime Technology | Reserved | www.runtime.co.uk | Ed Quincey | 19-Jan-2000 |
| RUZ | RJ Consultants | Various | Russell Jesson | 21-Jan-2000 | |
| RV | Nevrona Designs | Rave | www.nevrona.com | Jim Gunkel | 18-Jul-1999 |
| RV | Sergey Tkachenko | RichView | www.crosswinds.net/~svtpro/ | Sergey Tkachenko | 30-Jul-1999 |
| RVS | Reserved | Russell Hewitt | 27-Oct-1999 | ||
| RW | Bob Watson | Reserved; Reserved | Bob Watson | 03-Jul-1998 | |
| RW | R. Watson and Associates | Richard's Components | Richard Watson | 07-Apr-1999 | |
| RW | RouteWare | RWNet | www.routeware.dk | Uffe Kousgaard | 28-Apr-2000 |
| RW | RAPWare | rapware | www.rapware.nl/ | Andre Mens | 14-Feb-2002 |
| RX | Master-Bank | RX Library; Toolkit | rx.demo.ru | Fedor Koshevnikov | 30-Dec-1899 |
| RZ | Raize Software, Inc. | Raize Components | www.raize.com/DevTools/RzComps | Ray Konopka | 28-Apr-1998 |
| Rz | Raize Software | Raize Components | www.raize.com/DevTools/RzComps | Ray Konopka | 22-Jan-2013 |
| rz | iMakeSoftware | Various | www.iMakeSoftware.com | Robert Zolkos | 08-Jul-2000 |
| RZS | Rudolf Ziegaus | Reserved; Reserved | www.bingo.baynet.de/~rz259/ | Rudolf Ziegaus | 30-Dec-1998 |
| RZZ | Razz Technological Enterprises | Razz Components | www.razzent.com | Kyle A. Miller | 28-May-1999 |
| r_c | R.A.Cernis | 04-Sep-2004 |