CSL

CSL Computer Service Langenbach GmbH is a German internet service provider and application hoster based in Düsseldorf, operating since 1995. The company runs its own data center in Düsseldorf and has been an ICANN-accredited domain registrar since 2001. CSL offers managed hosting, root servers, private cloud solutions, colocation, domain registration, SSL certificates, and connectivity services. They emphasize personalized support with direct contacts, 24/7 infrastructure monitoring, and a partnership-based approach. Founded in 1972, CSL has been in the internet services market for decades and is known for long-standing customer relationships.