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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.

Easy whois is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

Mark Monitor WHOIS is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

API to search current and historical DNS records, current and historical WHOIS, technologies used by sites and whois search for phone, email, address,

is a web service for Whois data contained within ARIN's registration database

WhoIsHostingThis is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

WhoisMind is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

Whoisology is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

Domain intelligence tool for researching WHOIS data, ownership patterns, and connected domains.

Free and open-source domain and infrastructure research toolkit combining DNS, RDAP, WHOIS, passive subdomain discovery, IP and ASN data, email authen

Free DNS, WHOIS, DKIM discovery, SPF/DMARC analysis and blacklist checks with plain-English results, no signup.

Retrieve DNS records, subdomains, SSL certificates and WHOIS / RDAP data for a given website.

CentralOps collection of DNS, WHOIS, traceroute, email, and network lookup tools.

The site allows you to look up domain registration information (WHOIS) on the internet

Is a free platform offering network diagnostic tools (ping, traceroute, MTR, DNS, WHOIS, HTTP, etc.) tailored for ISPs and infrastructure professional

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

Who.is is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

DNS History is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

OSINT.sh tool for checking historical DNS records and domain infrastructure changes.

Search tool for archived 8chan and 8kun QResearch posts and related board history.

OSINT.sh certificate search for finding TLS certificates, domains, and certificate history.

is an online database that will provide you a report with detail information about a particular website and the history associated with it.