Netnod
Netnod AB (previously Netnod Internet Exchange i Sverige AB) is a private limited company based in Stockholm, Sweden, that operates Internet exchange points and manages one of the thirteen root name servers for the Domain Name System (DNS). It also distributes the official Swedish time through the Network Time Protocol (NTP). It is fully owned by the nonprofit foundation TU-stiftelsen / TU-foundation (Stiftelsen för Telematikens utveckling, eng The Foundation for the development of telematics).