EstDomains was a website hosting provider and a Delaware corporation headquartered in downtown Tartu, Estonia. EstDomains was known for hosting websites with malware, child pornography, and other illegal content. Brian Krebs of The Washington Post stated that EstDomains "appeared to be the registrar of choice for the infamous Russian Business Network." EstDomains was one of the largest domain registrars in the world. By 2007 EstDomains gained a reputation for hosting illegal content.