webwhois.verisign.com
Verisign WHOIS lookup for checking domain registration records and registry information.
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osint.sh
Reverse WHOIS lookup for finding domains connected to the same registrant, email, or ownership details.
osint.sh
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.
securitytrails.com
API to search current and historical DNS records, current and historical WHOIS, technologies used by sites and whois search for phone, email, address,
one-plus.github.io
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.
github.com
Awesome CSEs is a public GitHub repository that hosts a list of custom browser search engine configurations and shortcuts. It is designed to improve daily workflow by replacing Chrome's default long, hard-to-trigger custom search engine keywords with short, memorable alternatives. The list includes provided shortcuts for services including Gmail, GitHub, Amazon, Airbnb, reference sites, and specialized tools like filming location and whois lookups, reducing the number of keystrokes needed to access targeted search results directly.
cutestat.com
CuteStat is a web service for website owners, webmasters and general internet users to retrieve information related to domain name, IP address, web server and search engine optimization. It provides statistical reports for any website, including website valuation, search engine reports, traffic reports, social engagement, safety, host information, domain WHOIS and page speed.
aware-online.com
A custom OSINT tool from Aware Online Academy for investigating a target website. It provides scripts to view historical WHOIS data, check website text and source code on third-party sites, visualise links, map web pages, check Reddit presence, find open FTP ports and find other top level domains.
dnslytics.com
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.
centralops.net
CentralOps collection of DNS, WHOIS, traceroute, email, and network lookup tools.