whois, detective work, crunchbase...also do work in china which is even tougher: http://www.theguardian.com/technology/2015/sep/21/google-is-returning-to-china-

whois, detective work, crunchbase...also do work in china which is even tougher: http://www.theguardian.com/technology/2015/sep/21/google-is-returning-to-china-it-never-really-left http://www.theguardian.com/technology/2015/sep/21/google-is-...