All users which currently have 100% on a site.
| Username | Site | First Track | Master since | Track-Time | From | |
|---|---|---|---|---|---|---|
 | juanescobar | RedTigers Hackit | Feb 27, 2015 - 00:26:33 | Mar 01, 2015 - 05:24:24 | 2d 4h | 5.42% |
 | jsmind | SuNiNaTaS | Apr 23, 2012 - 10:32:24 | Apr 23, 2012 - 10:32:24 | 0s | 100.00% |
 | JrXnm | RedTigers Hackit | Jul 24, 2018 - 11:13:07 | Aug 04, 2018 - 17:48:05 | 11d 6h | 0.00% |
 | joyflower | pwnable.kr | Jul 19, 2016 - 12:02:51 | Nov 24, 2016 - 06:21:59 | 127d 19h | 6.86% |
 | JosipF | RedTigers Hackit | Jul 24, 2013 - 17:56:46 | Jul 25, 2013 - 15:54:56 | 21h 58m | 0.00% |
| joizel | SuNiNaTaS | Dec 03, 2015 - 14:51:52 | Dec 03, 2015 - 14:51:52 | 0s | 100.00% |
| jnvb | SuNiNaTaS | Sep 17, 2012 - 18:54:04 | Sep 19, 2012 - 04:36:31 | 1d 9h | 63.87% |
| jjk | Electrica | Apr 14, 2012 - 18:07:24 | Dec 11, 2013 - 00:42:58 | 1y 240d | 0.00% |
| jjk | hax.tor.hu | Jun 03, 2014 - 22:54:49 | Feb 10, 2019 - 20:48:05 | 4y 252d | 98.00% |
| jjk | OverTheWire.org | Feb 25, 2014 - 15:12:00 | Dec 26, 2014 - 18:20:32 | 304d 3h | 0.00% |
| jjk | WeChall | Mar 23, 2008 - 18:34:06 | Dec 30, 2011 - 09:33:29 | 3y 281d | 3.45% |
| Jinx | HackThisSite | Jul 02, 2009 - 21:02:05 | Apr 05, 2023 - 20:28:38 | 13y 279d | 44.42% |
| Jinx | IRISSCON 2012 Lost Challenges | Sep 20, 2013 - 20:47:16 | Mar 05, 2014 - 10:20:52 | 165d 14h | 0.00% |
| Jinx | Revolution Elite | Feb 15, 2011 - 15:41:43 | Jun 20, 2011 - 22:01:06 | 125d 5h | 6.82% |
| jinmo123 | pwnable.kr | Mar 10, 2016 - 15:57:16 | May 06, 2016 - 08:29:07 | 56d 15h | 96.98% |
| jinmo123 | RedTigers Hackit | Nov 02, 2013 - 05:19:55 | Nov 02, 2013 - 09:39:59 | 4h 20m | 0.00% |
| jinmo123 | SuNiNaTaS | Jan 05, 2013 - 08:53:25 | Jan 05, 2013 - 08:53:25 | 0s | 100.00% |
| jinmo123 | Tasteless | Oct 23, 2013 - 18:21:28 | Oct 24, 2013 - 17:18:58 | 22h 57m | 0.00% |
| jin03 | SuNiNaTaS | Apr 20, 2012 - 00:29:54 | Apr 20, 2012 - 00:29:54 | 0s | 100.00% |
| JimmyZhou | RedTigers Hackit | Mar 04, 2015 - 08:16:13 | Mar 04, 2015 - 08:16:13 | 0s | 100.00% |
 | jimeefr | RedTigers Hackit | Apr 18, 2016 - 12:25:55 | Apr 18, 2016 - 14:41:46 | 2h 15m | 0.00% |
| JHSN | RedTigers Hackit | Apr 25, 2017 - 19:58:48 | Apr 27, 2017 - 17:01:10 | 1d 21h | 0.00% |
| JesseMK | RedTigers Hackit | Jul 13, 2016 - 04:23:38 | Jul 19, 2016 - 18:06:31 | 6d 13h | 0.00% |
| jeong0su | SuNiNaTaS | Jun 09, 2016 - 07:24:08 | Jun 27, 2016 - 08:56:47 | 18d 1h | 84.38% |
| Jeong | SuNiNaTaS | Nov 01, 2014 - 17:10:16 | Jan 16, 2015 - 15:55:28 | 75d 22h | 87.47% |
| jefenux99 | RedTigers Hackit | Nov 18, 2015 - 23:15:50 | Nov 18, 2015 - 23:24:50 | 9m | 0.00% |
 | jcfs | Net-Force | Oct 25, 2008 - 21:42:02 | Oct 25, 2008 - 21:42:02 | 0s | 100.00% |
| Jarvis777 | RedTigers Hackit | Aug 04, 2016 - 01:21:45 | Aug 04, 2016 - 21:01:19 | 19h 39m | 0.00% |
| JanLitwin17 | SuNiNaTaS | May 13, 2023 - 03:11:08 | Nov 20, 2023 - 17:07:45 | 191d 14h | 0.00% |
| Jakkdu | Reversing.Kr | Sep 26, 2013 - 10:08:48 | Oct 29, 2013 - 09:31:38 | 33d 22m | 58.06% |
| JaeHyuk-Lim | RedTigers Hackit | Dec 27, 2014 - 02:59:45 | Apr 29, 2015 - 10:49:25 | 123d 6h | 31.45% |
| JaeHyuk-Lim | SuNiNaTaS | Dec 20, 2014 - 14:16:20 | Dec 20, 2014 - 14:16:20 | 0s | 100.00% |
| JaeHyuk-Lim | wargame.kr | Dec 20, 2014 - 14:16:08 | Dec 20, 2014 - 14:16:08 | 0s | 100.00% |
| JaeHyuk-Lim | Webhacking.kr | Dec 20, 2014 - 14:16:18 | Apr 29, 2015 - 11:02:55 | 129d 19h | 98.30% |
 | jablonskim | Hacker Gateway | Mar 10, 2017 - 01:04:01 | Mar 10, 2017 - 14:15:58 | 13h 11m | 63.64% |
| jablonskim | hax.tor.hu | Nov 14, 2009 - 21:26:46 | Feb 15, 2017 - 12:55:51 | 7y 94d | 10.00% |
| jablonskim | RedTigers Hackit | Aug 22, 2013 - 20:00:38 | Jan 29, 2017 - 10:25:09 | 3y 160d | 0.00% |
| jablonskim | ThisisLegal.com | Jul 20, 2009 - 16:56:27 | Oct 14, 2019 - 00:26:49 | 10y 87d | 22.67% |
| J4Nobody | RedTigers Hackit | Aug 10, 2018 - 03:59:49 | Aug 29, 2018 - 17:56:45 | 19d 13h | 0.00% |
| ITPPA | RedTigers Hackit | Feb 10, 2017 - 07:36:27 | Mar 28, 2017 - 06:48:39 | 45d 22h | 0.00% |
| itchy | SuNiNaTaS | May 09, 2013 - 17:29:52 | Oct 23, 2013 - 12:52:11 | 166d 19h | 30.24% |
 | IPYouFy | CSTutoringCenter | Mar 26, 2011 - 23:41:13 | Apr 02, 2011 - 16:18:29 | 6d 15h | 0.00% |
| IPYouFy | osix | Mar 03, 2011 - 03:01:56 | Mar 26, 2011 - 21:15:35 | 23d 18h | 79.71% |
| IPYouFy | Revolution Elite | Apr 20, 2011 - 20:57:10 | May 10, 2011 - 21:19:52 | 20d 22m | 0.00% |
| ioqt00 | LordofSQLi | Mar 02, 2020 - 21:44:46 | Apr 30, 2020 - 20:34:57 | 58d 21h | 32.65% |
| iolrachas | RedTigers Hackit | Feb 13, 2016 - 19:14:54 | Feb 13, 2016 - 19:16:35 | 1m 41s | 0.00% |
 | invik | +Ma's Reversing | Mar 22, 2012 - 22:29:36 | Jan 21, 2016 - 14:34:10 | 3y 304d | 3.57% |
 | integeruser | CSTutoringCenter | Dec 27, 2014 - 16:12:41 | Feb 02, 2016 - 20:54:43 | 1y 37d | 0.00% |
| integeruser | hax.tor.hu | Jun 11, 2016 - 15:01:16 | Jun 24, 2016 - 20:15:37 | 13d 5h | 28.00% |
| integeruser | RedTigers Hackit | May 03, 2014 - 23:08:06 | May 27, 2014 - 12:30:31 | 23d 13h | 0.00% |