certasset Small Python rough Script which Takes ip range => check if port 443 is open on each ip => Scan all SSL Certs => Grab Cnames Domain... default - 100 Threads https://medium.com/@arbazhussain/gathering-domains-subdomains-with-ipranges-of-organization-49362d8a1271 Usage : python subs_cert.py Idea From : https://github.com/cheetz/sslScrape