Domains Project

The world’s largest public dataset of active internet domains—over 1.7 billion freely available as sorted, deduplicated text files. Updated monthly. Includes tools for classification (LLMC), phishing monitoring, DNS checking, and crawling https://domainsproject.org

Reverse Whois Lookup by WhoisFreaks

Search millions of domain records by email, owner name, or company to uncover associated domains—ideal for brand protection, threat intel, and attack surface mapping. Supports historical and current WHOIS data across 1,400+ TLDs. https://whoisfreaks.com/tools/whois/reverse/search

corptrace

A corporate OSINT reconnaissance tool that enriches company domains with employee data, email patterns, tech stack insights, and social profiles—aggregating info from public sources to map organizational attack surfaces for red teams and security researchers. https://github.com/r1cksec/corptrace

HaveIBeenSquatted

A tool for CTI, conducting extensive checks to identify squatted domain names based on a given keyword, helping monitor brand security. https://haveibeensquatted.com/

SubDoSec

SubDoSec simplifies subdomain enumeration, offering a user-friendly platform for discovering and analyzing subdomains during investigations. https://subdosec.vulnshot.com/ #OSINT #Reconnaissance #Cybersecurity

Dnslytics

The ultimate online investigation tool with access to 330+ million active domains, mail servers, name servers, PTR records, and more. Get detailed data instantly. Paid, but free data can be good sometimes. https://dnslytics.com/ Investigate domains like never before #osint #cybersecurity #infosec originally posted on LinkedIn: https://www.linkedin.com/feed/update/urn%3Ali%3Ashare%3A7249315742288859136

SubDomainRadar.io

Comprehensive reconnaissance and vulnerability scanning tool, SubDomainRadar.io is a powerful platform designed for cybersecurity professionals, bug hunters, and penetration testers. It offers advanced subdomain discovery. https://subdomainradar.io/ #osint #cybersecurity #infosec

Rintel

Rintel is a cybersecurity platform that monitors global domain registrations in real-time to identify potential phishing or fraudulent sites targeting your brand. By leveraging advanced heuristics and automatic monitoring, Rintel enables organizations to detect and mitigate threats before they materialize, ensuring robust brand protection. https://rintel.io #cybersecurity #cti #brandprotection #infosec