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

NERD IP reputation search for checking network entities, abuse data, and security signals.

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

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

Search engine for exposed services, misconfigurations, leaked data, and internet-facing systems.

Threat intelligence search platform for malware indicators, IPs, domains, URLs, and hashes.

OSINT tool for collecting domain, IP, ASN, and infrastructure intelligence from multiple sources.

Security lookup platform for scanning files, hashes, URLs, IPs, and domains against threat data.

Internet asset search engine for domains, IPs, ports, certificates, and exposed services.

OSINT.sh online Nmap-style scanner for checking visible ports and network services.

OSINT search engine for exposed assets, IPs, domains, certificates, and network data.

OSINT.sh SSL check for testing whether a host appears vulnerable to POODLE.

Web vulnerability search engine for finding reported security issues across websites.

Python tool that identifies hashes, emails, IPs, URLs, and other strings found in text or files.

OSINT.sh tool for finding websites connected by shared Google AdSense identifiers.

OSINT.sh tool for finding websites connected by shared Google Analytics tracking IDs.

OSINT.sh tool for finding domains that share the same mail exchanger records.

is an IP address and domain name based researching websites that offers multiple services such as Reverse DNS Lookup, Whois, and AS Macros.

Internet asset intelligence platform for domains, IPs, certificates, and exposed infrastructure.

Online checksum tool for calculating hashes from text or files for verification and security checks.

Threat intelligence search engine for domains, IPs, hashes, malware, and related indicators.

Online hashing tool for generating and checking MD5, SHA, and other common hash values.

Aware Online tool for searching websites, domains, indexed pages, and related OSINT clues.

OSINT.sh tool for checking historical WHOIS records and domain ownership changes.