| 2023-04-13 16:09:25 | dipswitch | Updated Yoda as organiser of Underground Conference 1999: changed role to Sound |
| 2023-04-13 16:09:17 | dipswitch | Added Floetus as organiser of Underground Conference 1999 |
| 2023-04-13 16:08:59 | dipswitch | Updated KB as organiser of Underground Conference 1999: changed role to Compos, sound |
| 2023-04-13 16:08:40 | dipswitch | Added Räd-Äd as organiser of Underground Conference 1999 |
| 2023-04-13 16:08:24 | dipswitch | Updated Masta as organiser of Underground Conference 1999: changed role to Network |
| 2023-04-13 16:07:45 | dipswitch | Added Vacuum as organiser of Underground Conference 1999 |
| 2023-04-13 16:07:09 | dipswitch | Added Purge as organiser of Underground Conference 1999 |
| 2023-04-13 16:07:05 | dipswitch | Added Smash Designs as organiser of Underground Conference 1999 |
| 2023-04-13 16:02:41 | dipswitch | Added sYntiq as organiser of Underground Conference 1999 |
| 2023-04-13 16:02:22 | dipswitch | Added Rudi as organiser of Underground Conference 1999 |
| 2023-04-13 16:01:47 | dipswitch | Added n0tty as organiser of Underground Conference 1999 |
| 2023-04-13 16:01:39 | dipswitch | Added Yoda as organiser of Underground Conference 1999 |
| 2023-04-13 16:01:30 | dipswitch | Added Fashion as organiser of Underground Conference 1999 |
| 2023-04-13 16:01:22 | dipswitch | Added KB as organiser of Underground Conference 1999 |
| 2023-04-13 16:01:17 | dipswitch | Added Masta as organiser of Underground Conference 1999 |
| 2023-04-13 16:01:10 | dipswitch | Added Paniq as organiser of Underground Conference 1999 |
| 2023-04-13 16:01:01 | dipswitch | Added Scamp as organiser of Underground Conference 1999 |
| 2023-04-13 16:00:45 | dipswitch | Added Steeler as organiser of Underground Conference 1999 |
| 2019-03-03 06:27:55 | menace | Set start date to 25 June 1999, end date to 27 June 1999, location to Daxweiler, Germany |
| 2016-01-16 08:13:21 | menace | Set website to http://uc3d.untergrund.net/ |
| 2012-11-26 19:37:33 | menace | Edited notes |
| 2012-11-26 19:32:40 | menace | Added competition Fast Graphics |
| 2012-11-26 19:29:22 | menace | Added competition Fast Music |
| 2012-11-26 19:25:07 | menace | Added competition Shit Music |
| 2012-11-26 19:12:04 | menace | Added competition Graphics |
| 2012-11-26 19:07:29 | menace | Added competition Multichannel |
| 2012-11-26 19:06:28 | menace | Added competition Multichannel With Live Support |
| 2012-11-26 19:05:15 | menace | Added competition Demo |
| 2012-11-26 19:04:17 | menace | Edited notes |