Tools for investigating domains, websites, and web infrastructure. Covers registration data, DNS records, IP geolocation, content archiving, and technology profiling.
Choosing Tools
- Use registration and DNS tools for ownership or infrastructure questions, archives for historical content, and scanners for observed web behavior.
- Separate current observations from historical records and corroborate links between domains before attributing ownership.
Tools
| Tool | Best for | Cost | Description | Guide |
|---|---|---|---|---|
| Distill.io | A website change monitoring tool that allows users to track changes on web pages. | Partially Free | Distill.io is a website change monitoring tool that allows users to track changes on web pages. | Details |
| DNS History | Collection of historical DNS information. | Free | Collection of historical DNS information. | |
| Domain Research Suite | Tools to obtain registration and ownership data for domain names, along with historica... | Paid | Domain Research Suite provides tools to obtain registration and ownership data for domain names, along with historica... | Details |
| DomainTools Whois Lookup | DomainTools Whois provides detailed domain name registration information, and can be used… | Partially Free | DomainTools Whois provides detailed domain name registration information, and can be used to investigate details abou... | Details |
| Geo Data Tool | IP geolocation service to identify the location and other technical information associated… | Free | IP geolocation service to identify the location and other technical information associated to IP addresses. | Details |
| Grep.app | Grep.app is a free web-based search engine that allows users to search the contents of… | Free | grep.app is a free web-based search engine that allows users to search the contents of public GitHub repositories. | Details |
| ICANN Lookup | This tool allows you to search for the current registration data of internet domains. | Free | This tool allows you to search for the current registration data of internet domains. | Details |
| IDN Checker | Detects visually similar versions of a domain. | Free | IDN Checker detects visually similar versions of a domain. | Details |
| Intelx.io | Find user details in data breaches | Partially Free | Find user details in data breaches | Details |
| Wayback Machine | The Internet Archive's Wayback Machine lets users view and archive web pages, aiding in… | Free | The Internet Archive's Wayback Machine lets users view and archive web pages, aiding in historical research and digit... | Details |
| Moz Link Explorer | Analyse the links of any website. | Free | Analyse the links of any website. | |
| PublicWWW | A source code search engine that allows you to search for any alphanumeric snippet,… | Partially Free | PublicWWW is a source code search engine that allows you to search for any alphanumeric snippet, signature, or keywor... | Details |
| Shodan | A search engine for internet-connected devices, from webcams to databases. | Partially Free | A search engine for internet-connected devices, from webcams to databases. | Details |
| The Information Laundromat | A tool for analyzing content replication and site architecture to detect information… | Free | A tool for analyzing content replication and site architecture to detect information laundering. | Details |
| Urlscan.io | Urlscan.io is an online tool that allows investigators to analyse, monitor, and document… | Free | urlscan.io is an online tool that allows investigators to analyse, monitor, and document websites in real time. | Details |
| Web Archives | A browser extension to view archived and cached versions of a website on multiple… | Partially Free | A browser extension to view archived and cached versions of a website on multiple archiving sites. | Details |
| What CMS | WhatCMS is a web-based tool for anyone needing information about the technologies behind… | Partially Free | WhatCMS is a web-based tool for anyone needing information about the technologies behind any website, including the c... | Details |
| Whoxy | A domain search engine or whois lookup" tool to find (the history of) registration… | such as the registrar | Whoxy is a domain search engine or whois lookup" tool to find (the history of) registration information on a domain |
Investigation Tips
- Start with WHOIS lookup (ICANN Lookup, DomainTools, Whoxy) to find domain registration details
- Check historical DNS records (DNS History) and archived versions (Wayback Machine)
- Use urlscan.io to analyze a website's behavior, redirects, and connected domains
- Shodan reveals internet-connected devices and services associated with an IP range
- PublicWWW searches HTML/JS/CSS source code across millions of websites
- The Information Laundromat detects content replication patterns and information laundering