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

DNSHistory is a developer resource for coding, documentation, communities, security research, or software tools.

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

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

A fast and multi-purpose DNS toolkit from ProjectDiscovery for running DNS probes, resolving records and filtering DNS responses.

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

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

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

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

Evervault is a developer resource for coding, documentation, communities, security research, or software tools.

A database of IP addresses that have been part of the Tor network. It answers the question whether there was a Tor relay running on a given IP address

Exploit DB is a developer resource for coding, documentation, communities, security research, or software tools.

Threat Intelligence API that detects if a IP address is associated with a VPN, Proxy, TOR or Bots.

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

Security research toolkit for extracting, transforming, and analyzing data during investigation workflows.

Frida is a developer resource for coding, documentation, communities, security research, or software tools.

FullHunt is an OSINT tool focused on identifying and protecting internet-exposed assets.

GNUnet is a developer resource for coding, documentation, communities, security research, or software tools.

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

HTTPToolkit is a developer resource for coding, documentation, communities, security research, or software tools.

Online service for detailed and free analysis of suspicious files and URLs.

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

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

AI-powered DNS and email security scanner with SPF, DKIM, DMARC, DNSSEC checks and fix suggestions.