SimpleReconSubdomain

SimpleReconSubdomain is a passive and active subdomain enumeration tool designed for OSINT and reconnaissance workflows, leveraging async Python to query 50 sources in parallel without external shell dependencies. Key features include multi-probe wildcard detection, DNSSEC NSEC zone walking, TLS SAN extraction, and advanced scraping techniques, which facilitate comprehensive subdomain discovery and enumeration, along with subdomain takeover detection capabilities. The tool supports continuous monitoring and provides output in various formats, making it suitable for integration into automated security workflows.