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

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.

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.

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

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.

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

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

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

Research paper and dataset about internet-wide scanning and host discovery from 2012.

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

IP 2 Geolocation is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

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

IP Geolocation API DB-IP is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

is used for mapping of an IP address or MAC address to the real-world geographic location of an Internet-connected computing or a mobile device.

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

Unlimited Reverse DNS, Subdomain and Reverse CNAME lookups, also provides JSON APIs.

IP geolocation API providing city, country, timezone, ASN, and currency data from IP addresses.

A comprehensive IP intelligence database and API for accurate geolocation, ASN mapping, and VPN/Tor/Proxy detection.

is used to find the approximate geographic location of an IP address along with some other useful information including ISP, TimeZone, Area Code, Stat

Free, no-login IP reputation lookup that aggregates up to 8 risk sources, flags residential vs datacenter, and profiles /24 C-block neighbors. Also of