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A dictionary-based MD5 reverse lookup service. Users can convert a string to its MD5 hash or submit a hash to look it up in a database of several million entries. The site explains what MD5 is and notes that MD5 hashes are theoretically impossible to reverse directly. It also lists recent successful reverses and links to related cryptography resources.
OSINT.SH is a collection of information gathering tools. It lists tools for finding public cloud buckets, subdomains, DNS history, reverse IP lookups, technology detection, certificate searches, DNS lookups, reverse Google Analytics and AdSense IDs, WHOIS history, reverse WHOIS, reverse domain searches, OCR text extraction, MD5 hash guessing, SSL checking, IP geolocation, and reverse MX and name server records.
Free reverse phone lookup for checking names, voicemail, address clues, and other public number details.
Reverse phone lookup tool for finding caller names and basic public details from phone numbers.
Reverse phone lookup that searches public profiles and people-search records connected to a phone number.
OSINT Toolkit Website Information is a collection of tools for researching websites, IP addresses, domains, emails and MAC addresses. It lists lookups including Ping Website, Whois, reverse Whois, network and TLD lookup, IP history and geolocation, MAC vendor lookup, DNS report and header and source code search. The page states that some tools require the IP address, email address, domain name or MAC address of the target.
A Chrome extension that reverse-looks up a LinkedIn profile from an email address, returning the name, profile id, username and profile image if a match is found. It requires an active LinkedIn login session and allows up to 50 unique email addresses searched. Version 1.0 was published Sep 3, 2019.
OSINT.sh reverse domain lookup for finding related domains and infrastructure links.
Reverse WHOIS lookup for finding domains connected to the same registrant, email, or ownership details.
OSINT.sh tool for finding domains and websites hosted on the same IP address.
OSINT.sh tool for checking historical DNS records and domain infrastructure changes.
DNSWatch offers DNS lookup and reverse DNS lookup tools with exact performance measuring and DNS server monitoring. It also provides RBL email blacklist lookup and IP location lookup. Paid products include DNS performance monitoring starting at $1 per month, mailserver blacklist monitoring starting at $3.5 per month, and a DNS changetracker starting at $7.9 per month. The site is free to use with ads.
A Chrome extension that restores the pre-2018 ability to look up the Facebook account linked to an email address, subject to privacy settings. It requires the user to be logged in to a Facebook account while the page is active, and returns the profile ID and profile image when a match is found.
Reverse email lookup tool for finding public profiles, social accounts, and identity clues linked to an email address.
OSINT platform for reverse email and phone lookups, helping investigators find public account links and digital traces.
CentralOps collection of DNS, WHOIS, traceroute, email, and network lookup tools.
Community phone lookup site for checking unknown callers, spam reports, and user comments on numbers.
AnalyzeID is a reverse lookup tool that searches Google Analytics, Google Adsense, Amazon affiliate, email, IP and other third-party IDs to find other websites owned by the same person. The site lists uses such as researching site owners, checking whether sellers are mass producing sites, and finding money sites. It presents itself as more than a reverse IP tool when owners host sites on different servers.
Unlimited Reverse DNS, Subdomain and Reverse CNAME lookups, also provides JSON APIs.
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.
DNSlytics is an online investigation tool for viewing information about IP addresses, domain names and providers. It offers DNS lookups, email testing, WHOIS lookups, and reports on AS/BGP, CIDR and TLD data. Premium website access and a premium API provide additional page views, monitors and data.
Domain monitoring tool for tracking DNS changes, records, and domain activity.
