May 17, 2021, 8:17 a.m. "InCTF 2021" dates changed.

May 16, 2021, 10:24 p.m. "DCTF 2021" scoreboard added.

May 16, 2021, 8:53 p.m. "m0leCon CTF 2021 Teaser" scoreboard added.

May 16, 2021, 5:44 p.m. "3kCTF-2021" scoreboard added.

May 16, 2021, 1:04 p.m. "OMH 2021 CTF" scoreboard added.

May 16, 2021, 2:27 a.m. "FarEastCTF - 2021" scoreboard added.

May 13, 2021, 4:04 a.m. "PwnTillDawn Online Battlefield - Goodwill Edition 2021" scoreboard added.

May 10, 2021, 3 p.m. "San Diego CTF 2021" scoreboard added.

May 9, 2021, 2:37 p.m. "DawgCTF 2021" scoreboard added.

May 8, 2021, 10:56 p.m. "saarCTF 2021" scoreboard added.

May 7, 2021, 6:38 a.m. "N1CTF 2021" is publically votable.

May 7, 2021, 6:38 a.m. "N1CTF 2021" published.

May 7, 2021, 6:37 a.m. "S.H.E.L.L. CTF" is publically votable.

May 7, 2021, 6:37 a.m. "S.H.E.L.L. CTF" published.

May 7, 2021, 6:37 a.m. "Hack-A-Sat 2 Finals" is publically votable.

May 7, 2021, 6:37 a.m. "Hack-A-Sat 2 Finals" published.

May 7, 2021, 6:37 a.m. "Hack-A-Sat 2 Qualifiers" is publically votable.

May 7, 2021, 6:37 a.m. "Hack-A-Sat 2 Qualifiers" published.

May 6, 2021, 5:38 p.m. "Hack-A-Sat Finals" scoreboard added.

May 6, 2021, 3:42 p.m. "HSCTF 8" dates changed.

May 6, 2021, 6:22 a.m. "redpwnCTF 2021" dates changed.

May 5, 2021, 6:31 a.m. "COMPFEST CTF 2021" is publically votable.

May 5, 2021, 6:31 a.m. "COMPFEST CTF 2021" published.

May 5, 2021, 6:31 a.m. "corCTF 2021" is publically votable.

May 5, 2021, 6:31 a.m. "corCTF 2021" published.

May 5, 2021, 6:31 a.m. "DCTF 2021" is publically votable.

May 5, 2021, 6:31 a.m. "DCTF 2021" published.

May 5, 2021, 6:31 a.m. "OMH 2021 CTF" is publically votable.

May 5, 2021, 6:31 a.m. "OMH 2021 CTF" published.

May 5, 2021, 6:30 a.m. "ICHSA CTF 2021" is publically votable.

May 5, 2021, 6:30 a.m. "ICHSA CTF 2021" published.

May 4, 2021, 3:36 p.m. "P'HackCTF" dates changed.

May 4, 2021, 11:30 a.m. "ImaginaryCTF" is postponed.

May 4, 2021, 7:30 a.m. "ICHSA CTF 2021" dates changed.

May 4, 2021, 7:26 a.m. "ICHSA CTF 2021" dates changed.

May 3, 2021, 10:31 p.m. "TAMUctf 2021" scoreboard added.

May 3, 2021, 7:38 p.m. "Really Awesome CTF 2021" published.

May 3, 2021, 7:37 p.m. "0CTF/TCTF 2021 Quals " is publically votable.

May 3, 2021, 7:37 p.m. "0CTF/TCTF 2021 Quals " published.

May 3, 2021, 7:37 p.m. "0CTF/TCTF 2021 Finals" is publically votable.

May 3, 2021, 7:37 p.m. "0CTF/TCTF 2021 Finals" published.

May 3, 2021, 7:37 p.m. "GrabCON" is publically votable.

May 3, 2021, 7:37 p.m. "GrabCON" published.

May 3, 2021, 7:36 p.m. "Hack Zone Tunisia 2021" is publically votable.

May 3, 2021, 7:36 p.m. "Hack Zone Tunisia 2021" published.

May 3, 2021, 1:50 a.m. "DEF CON CTF Qualifier 2021" scoreboard added.

May 2, 2021, 7:36 a.m. "COMPFEST CTF 2021" dates changed.

April 30, 2021, 8:36 a.m. "0CTF/TCTF 2021 Finals" dates changed.

April 26, 2021, 7:19 p.m. "HeroCTF v3" scoreboard added.

April 26, 2021, 3:32 p.m. "WPICTF 2021" scoreboard added.