Quad9 wins appeal against Sony

Quad9’s Opinion of the Recent Court Ruling in Leipzig

Sony's Legal Attack on Quad9, Censorship, and Freedom of Speech

German Court Rules Against Internet Security Non-Profit Quad9

Quad9 Files Official Objection Opposing Sony Music’s German Court Ruling

Quad9 is forced by Sony to block DNS resolution of pirate domains

Quad9 public DNS moves to Switzerland

IBM Quad9 – A free security solution using DNS to protect against cyber threats