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Threat intelligence platform aggregating malicious IP and domain data from multiple security feeds with real-time reputation scoring and threat catego

Network diagnostic toolbox for DNS, MX, blacklist, SMTP, and domain health checks.

Finds email addresses, domains, and URLs connected to a company or domain for OSINT and sales research.

is an IP address and domain name based researching websites that offers multiple services such as Reverse DNS Lookup, Whois, and AS Macros.

SimilarSites

similarsites.com

Discovery tool for finding websites similar to a domain, brand, or online service.

Open-source email alias service for receiving and replying without exposing a personal address, with apps, extensions, custom domains, and self-hosting support.

SitesLike

siteslike.com

Website discovery tool for finding similar websites by category, topic, or domain.

OSINT.sh tool for discovering subdomains connected to a target domain.

OSINT.sh tool for checking historical WHOIS records and domain ownership changes.

Verisign WHOIS lookup for checking domain registration records and registry information.

WHOIS intelligence service for searching domain ownership, history, and registrar data.

Cloudflare sign-up page for creating an account to manage domains, DNS, and web services.

Threat intelligence search service for checking IPs, domains, hashes, and security indicators.

WordPress plugin to enable your site as a NIP-05 endpoint for every registered user on your system using your domain.

Google certificate transparency search for checking certificates and HTTPS records.

Python OSINT crawler for extracting URLs, files, endpoints, and related website data.

OSINT tool for gathering emails, domains, hosts, and public data from search engines and sources.

Cipher387's large OSINT tool collection covering social media, domains, people, maps, and more.

Database of fake and fraudulent websites used to research online scams, phishing pages, and suspicious domains.

ABookOfCreatures helps find books, reading material, archives, or public-domain educational texts.

Abusech

hunting.abuse.ch

Abusech helps search threat intelligence, IP reputation, domains, and security investigation data.

Abuseipdb helps search threat intelligence, IP reputation, domains, and security investigation data.

Activist Handbook

activisthandbook.org

Activist Handbook helps find books, reading material, archives, or public-domain educational texts.

Website information page for traffic estimates, site metadata, and audience insights.