Whois History: How to Check the Domain Owner History

Survey of IP WHOIS and RDAP lookup tooling, from command-line utilities to web platforms, covering registry data, privacy-protected records, and how to investigate IP ownership fast.

Guide to autonomous system investigation: what ASNs and prefixes are, then practical lookup methods across WHOIS, RDAP, BGP collectors and enrichment platforms for attribution and infrastructure analysis.

Explains DNS history—how logs of past DNS changes reveal domain migrations, security trends and competitive insights—plus record types to inspect and tools like SecurityTrails and DNS Spy for retrieving it.

Separates SOCMINT fact from hype: what social media intelligence can and cannot reveal, how it differs from OSINT, the tools behind it, and real-world cases with ethical considerations.

Primer on threat intelligence: definition and value, elements of a mature program, the data lifecycle and platform/AI-driven tooling, with market-size and adoption statistics.

Practical domain reconnaissance guide: retrieving DNS records with dig, host and nslookup, WHOIS lookups, connectivity checks, discovering exposed services with Nmap, and inspecting SSL/TLS certificates.