Sublist3r is a powerful subdomain enumeration tool designed to enumerate subdomains of websites using OSINT. It searches multiple sources including Baidu, Yahoo, Google, Bing, Ask, Netcraft, DNSdumpster, VirusTotal, ThreatCrowd, SSL Certificates, and PassiveDNS to discover subdomains associated with a target domain.
Note: Subdomain enumeration can take 30-120 seconds depending on the target domain and number of sources queried.