breachdirectory.org
Breach exposure lookup service for checking whether an email appears in known breach datasets.
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docs.google.com
This is a no-longer-maintained Google Sheets resource collection compiled by AaronCTI, with its updated version hosted at OSINTPORTAL.COM. It categorizes links to cyber threat intelligence and open source intelligence resources for lookups including email addresses, IP addresses, social media profiles, and data breaches.
fcc.io
FCC.io is a search and URL shortener for FCC ID queries. It lets users share FCC ID searches via links, email, IRC, or instant messaging using a simple URL scheme. The author states that the site and its author are not affiliated with the FCC.
ismalicious.com
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.
github.com
A user-friendly Python toolkit for open source intelligence, providing key features such as image geolocation, social media profiling, email breach checks, domain lookup, metadata extraction, Google dorking, Wayback Machine queries, IP geolocation with blacklist checks, reverse image search, among others.
pypi.org
Python tool that identifies hashes, emails, IPs, URLs, and other strings found in text or files.
booleanstrings.com
A Boolean Strings blog post describing how Custom Search Engines can search public voter records on voterrecords.com, which holds data for sixteen US states. Records include names, addresses and potentially emails, phone numbers and gender. The site allows searching by name, city, state, party and year of birth, and X-Ray queries can target additional values.
intelx.io
Intelligence X provides a collection of free open source intelligence (OSINT) and forensic tools for investigative use. The tools support lookups for emails, domains, IP addresses, Bitcoin addresses, images, usernames, people, phone numbers, locations, files, VINs, and hashes, alongside social media intelligence tools for Facebook, Twitter, LinkedIn, Telegram, and YouTube, plus AI-powered search features. All third-party lookup services open in pop-up tabs, and the provider disclaims responsibility for third-party service results.
website.informer.com
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.