| Prefix | Organization | Purpose | Web Site | Contact | Registered |
|---|---|---|---|---|---|
| LB | TurboPower Software Company | LockBox; Toolkit | www.turbopower.com | Julian M Bucknall | 16-May-1998 |
| LBD | Little Brother Developments | Several components and experts | www.rylander.nu | Fredric Rylander | 01-Mar-2002 |
| LBI | The Last Byte, Inc. | www.lastbyte-inc.com | Alfred Ayache | 11-May-1999 | |
| LBM | LBM Software Development | www.lbm.com | Patrick van Logchem | 21-Oct-1999 | |
| lc | LaCharge, Inc. | Reserved | www.lacharge.com | Tom Stechow | 11-Feb-2000 |
| LC | Larsson Consulting | Various components | www.larssonconsulting.com | Fredrik Larsson | 06-Feb-2008 |
| LD | Lovedata Software | All Packages | www.lovedata.com | Robert Love | 28-Apr-1999 |
| ldi | Discover Excellence Corporation Pty Ltd | regular expression library | Dominic Kennedy | 15-Jan-2013 | |
| LDS | Luigi D. Sandon | LDSShellSuite | www.sandon.it | Luigi D. Sandon | 31-May-2000 |
| LDS | All components | www.sandon.it | Luigi D. Sandon | 01-Jun-2000 | |
| LDS | sandon.it | All | www.sandon.it | Luigi D. Sandon | 15-Jun-2000 |
| LEG | Legitima Software | Reserved; Reserved | www.legitima.com | Gabriel Cherem | 19-Mar-1999 |
| LG | Lars-Göran Andersson | 17-Nov-1999 | |||
| LGI | The Loewen Group Inc | n/a | www.loewengroup.com | Lance Kujala | 08-Sep-2000 |
| LI | Locus Informaticum b.v. | LiSearchDialogs, deLIfact | www.locusinformaticum.com | Eric ten Westenend | 23-Mar-2000 |
| LKS | LANkind (UK) Ltd | Reserved | www.lankind.co.uk | Richard Berends | 15-Sep-1999 |
| LL | American Institutes for Research | Literacy Ledger | www.air.org | Robert Leland | 18-Aug-1999 |
| LL | Loyalty Logic Limited | www.loyaltylogic.co.uk | Kashif Saeed | 17-Aug-2001 | |
| LM | Like Magic Ltd | Reserved | Maurice Butler | 14-Oct-1999 | |
| LMB | Lisa Byrne | Reserved; Reserved | www.netspace.net.au/~byrnel | Lisa Byrne | 01-Feb-1999 |
| LMD | LMD Innovative | LMD Tools; Toolkit | www.lmd.de | 30-Dec-1899 | |
| LMS | Life Management Solutions Pty Ltd | LogoShape et alii | Raymond Kennington | 30-Jun-1999 | |
| LMX | L+M Business Tools and Services | Various | www.lnm.nl | Paul Niehaus | 11-Sep-2003 |
| LO | Lorenz Graf | www.lograf.com | Lorenz Graf | 25-Jul-1999 | |
| LoP | Lo Pere Productions | ManyComponentsForMyOwnUse | Pere Albert | 02-Dec-2003 | |
| Lou | Louis L. Covert | 20-Nov-1999 | |||
| LQ | Logiquel inc. | www.logiquel.com | Alain Quesnel | 24-Feb-2003 | |
| LR | SC IASSID SCA | www.geocities.com/lracu | Liviu Racu | 19-Apr-2000 | |
| LRS | Terje Larsen | LrsBmp; VCL | home.sol.no/~ter-la/ | Terje Larsen | 30-Dec-1998 |
| LS | Hill Laboratories | Reserved | Colin | 27-Sep-1999 | |
| LS | Think Factory GmbH and Co. KG | www.think-factory.de | Levend Sener | 06-May-2000 | |
| ls | J.J. Heddes | 28-May-2000 | |||
| LSA | LSA Soft | LSA_Tools | Ludo Saenen | 03-Apr-2000 | |
| LSI | Legend Software, Inc. | All Packages | www.legendsoft.com | Kevin Boswell | 17-Mar-2000 |
| LSL | LalSoft Limited | Various | www.draculus.freeserve.co.uk/Default.htm | Philip Smith | 18-Oct-1999 |
| LSS | Lassie Accounting System | lassie.finalfiler.com | Amanda Lee | 24-Dec-1999 | |
| LS_ | Laika Services | Reserved; Reserved | Albert Passy | 01-Feb-1999 | |
| LT | tietzenet | www.tietzenet.de | Lutz Tietze | 06-Mar-2002 | |
| LT | tietzenet | reserved | www.tietzenet.de | Lutz Tietze | 14-Mar-2002 |
| LuM | Reserved | Sergey V. Mishin | 10-Sep-1999 | ||
| LV | LV | diverse | Lukas Vennemann | 01-Mar-2000 | |
| lv | L and S Network | all | Lynn Alvey | 09-May-2000 | |
| LW | puhlmann electronics | Reserved | Sebastian Modersohn | 08-Apr-1999 | |
| lw | Logicworks, Inc. | Logicworks Components | www.logicworksinc.com | Mark Theiste | 19-Sep-2001 |
| lx | Plan B HelpMaker 3.0 | helpmaker.hypermart.net/ | Peck Kim Han | 12-Dec-1999 | |
| lz_ | LANsoft (UK) Ltd | General | www.lankind.co.uk | Richard Berends | 10-Jan-2000 |
| lz_ | LANkind (UK) Ltd | www.lankind.co.uk | Richard Berends | 21-Aug-2000 |