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Daily-updated ranking of the top one million websites by referring subnets, used for prioritising checks against high-traffic platforms.

Searchable Certificate Transparency log explorer. Reveals subdomains, historical certificates, and infrastructure relationships through TLS issuance records.

Open-source automated reconnaissance and entity-graph framework with 200+ modules covering domains, IPs, emails, and breach data. SpiderFoot HX is the hosted commercial variant.

Twitter Back From The Death looks in a user tweets history for domain names that are available for registration.

CloudFail is a tactical reconnaissance tool which aims to gather enough information about a target protected by Cloudflare in the hopes of discovering the location of the server. Using Tor to mask all[...]

Find out everything about a domain name, IP address or provider. Discover relations between them and see historical data. Use it for your digital investigation, fraud prevention or brand protection.

Discover the reverse DNS entries for an IP address, a range of IP addresses or a domain name. IP based reverse DNS lookups will resolve the IP addresses in real time, while the domain name or hostname[...]

ONYPHE is an Attack Surface Management & Attack Surface Discovery solution built as a Cyber Defense Search Engine. We scan the entire Internet and Dark Web for exposed assets and crawl the lin[...]

This is an Internet-scale port scanner. It can scan the entire Internet in under 5 minutes, transmitting 10 million packets per second, from a single machine. Its usage (parameters, output) is simila[...]

We scan the entire public internet, create real-time threat intelligence streams, and reports that show the exposure of what is connected to the Internet.