This documentation page lists IPv4 and IPv6 addresses for the Cloudflare DNS resolvers 1.1.1.1 and 1.1.1.1 for Families, providing two addresses per resolver for redundancy. The standard resolver offers DNS lookups with no content filtering. The for Families variant adds automatic filtering to block known malware, phishing and optionally adult content.
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A knowledge base page that suggests a list of trusted DNS providers, including public anycast resolvers such as AdGuard DNS, 360 Secure DNS and Ali DNS. It states that AdGuard Ad Blocker or AdGuard VPN must first be installed on a device before a provider link is used. AdGuard DNS servers are listed for blocking ads, tracking and phishing, for family protection, and for unfiltered connections.
A free domain research tool that discovers hosts related to a domain and looks up DNS records. It presents visible hosts from an attacker's perspective for red and blue teams, and is intended for reconnaissance, penetration testing, bug bounties, threat analysis and network OSINT.
Domain Tools is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.
A blog post listing free DNS resolvers with their IP addresses, origin locations and notes such as logging policy and DNSSEC support. Entries include DNS.watch, Cloudflare, DNScrypt.eu, UncensoredDNS and OpenNIC.
Online service for detailed and free analysis of suspicious files and URLs.
HypeStat is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.
IPLeak.net is a diagnostic page that shows the IP addresses, DNS resolvers, WebRTC and torrent address information a visitor's system exposes to websites. It also explains WebRTC and DNS leaks and lists request details such as user agent and headers.
IPVoid is a free service from NoVirusThanks Company Srl offering online IP address, network and DNS tools. It began in 2010 as an IP blacklist checker and later added more tools, now numbering more than 80, usable from a web browser without registration.
Merklemap is a subdomain and certificate transparency search engine. It collects Certificate Transparency data by live tailing CT logs and indexing certificates, and offers a web interface, an API, and a CLI for searching subdomains and SSL/TLS certificates.
Threat analysis service for URLs, files, certificates, domains, and suspicious hashes.
Pulsedive is a free threat intelligence platform for searching, scanning and enriching IPs, URLs, domains and other IOCs from OSINT feeds or submitted data. It supports on-demand passive or active scans and a query language for pivoting across indicators and threats, with export options. Paid tiers are listed for non-commercial and commercial use, including API and feed access.
Redirect Detective is a free URL redirection checker that shows the complete path a redirected URL goes through. It can be used to trace affiliate links, check shortened links, verify redirects and see where cookies are set.
Robtex offers free DNS lookup and network intelligence. It gathers public information about IP numbers, domain names, host names, autonomous systems and routes, indexes it in a database, and provides lookup tools including reverse DNS, Whois and AS macros.
Similarweb is an AI-powered digital data intelligence company. It provides real-time market intelligence, competitive insights, and consumer trend data to help businesses accelerate their growth through access to digital market information.
urlscan is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.
URLVoid is a free website reputation checker. It scans a website against multiple reputation and blocklist services to help determine whether it is safe or malicious, and provides a safety report with blocklist names and IP and domain details.
ViewDNS.info is a site offering free DNS and IP tools, including Reverse IP Lookup, WHOIS, DNS Records, Subdomain Finder, Port Scanner, IP Location and DNS Propagation Checker. It also provides API documentation for domain, IP and network intelligence, with a Sandbox plan of 250 free trial queries and paid plans from $49 per month for 2,500 monthly queries.
Who.is is a domain and IP information lookup service. It offers WHOIS and RDAP lookups, DNS records, nameserver lookup, IP address lookup, domain history and uptime checks. Premium offerings include downloadable domain history reports, website monitoring for up to 10 domains and API access providing parsed WHOIS, RDAP, DNS and TLS certificate data as JSON over HTTPS, with a free tier.
WhoIsMind offers a free IP address lookup tool that reports an IP address's location, ISP, ASN and domain information. The site also explains reverse IP lookups, which return the hostname or domain associated with an IP address via PTR records, and discusses public, private, static and dynamic IP address types.