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.
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.
digga is a free domain and infrastructure research tool that looks up DNS records, RDAP and WHOIS data, subdomains, IP details and email authentication in one report. It supports many DNS record types and passive subdomain enumeration. The project is open source under AGPL 3.0 with no accounts or paywalls.
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.
isMalicious checks IPs, domains, URLs, emails, phones and crypto wallets against indexed threat indicators. It returns verdicts with contributing sources, categories and a risk score from 0 to 100 in a JSON response. Data is available through a REST API, STIX/TAXII feeds and an MCP integration for AI assistants. A free plan allows 50 lookups per month.
Website.informer offers a free aggregated report on any domain, including WHOIS, visitors, IP and DNS details, competitors, and owners. It provides website statistics such as daily visitors, safety status, and global rank, plus competitor and similar-site research. It also offers IP and DNS lookup, WHOIS records, a browser extension for website analysis and security checks, and email-to-domain matching from WHOIS data.
Ahrefs is an AI marketing platform built on a proprietary web index, offering tools for SEO, competitive intelligence, content marketing, website performance, local SEO, social media and reporting. Its Brand Radar tracks brand mentions, citations and sentiment across AI chatbots. Subscription plans are Lite, Standard and Advanced, with an annual billing discount stated.
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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.
digga is a free domain and infrastructure research tool that looks up DNS records, RDAP and WHOIS data, subdomains, IP details and email authentication in one report. It supports many DNS record types and passive subdomain enumeration. The project is open source under AGPL 3.0 with no accounts or paywalls.
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.
isMalicious checks IPs, domains, URLs, emails, phones and crypto wallets against indexed threat indicators. It returns verdicts with contributing sources, categories and a risk score from 0 to 100 in a JSON response. Data is available through a REST API, STIX/TAXII feeds and an MCP integration for AI assistants. A free plan allows 50 lookups per month.
Website.informer offers a free aggregated report on any domain, including WHOIS, visitors, IP and DNS details, competitors, and owners. It provides website statistics such as daily visitors, safety status, and global rank, plus competitor and similar-site research. It also offers IP and DNS lookup, WHOIS records, a browser extension for website analysis and security checks, and email-to-domain matching from WHOIS data.
Ahrefs is an AI marketing platform built on a proprietary web index, offering tools for SEO, competitive intelligence, content marketing, website performance, local SEO, social media and reporting. Its Brand Radar tracks brand mentions, citations and sentiment across AI chatbots. Subscription plans are Lite, Standard and Advanced, with an annual billing discount stated.
