Top 10 Subdomain Finders for Great Website Reconnaissance (2024)

FAQs

What is the best tool to find subdomains? ›

SUNFINDER is a subdomain discovery tool that is available in Kali Linux. It is a command-line tool that can be used to find subdomains of a target domain. SUNFINDER is written in Python and uses various search engines and APIs to discover subdomains.

As you can see, the most popular subdomain is by far "www" (the famous World Wide Web initials still in use today), followed by mail, forum, m, and blog.

Subdomain Tracking with Google Analytics 4: Final Words

GA4 handles the subdomains of the same domain automatically. Just make sure that you have installed GA4 (with the same measurement ID) on all subdomains. Use the same GA property and data stream for all subdomains.

One disadvantage of using subdomains for SEO is that they are treated as separate entities by search engines, which can dilute the overall authority of your main site. Additionally, managing content on subdomains can be more complex than on a subdirectory, as it requires separate hosting and maintenance.

Google treats subdomains as distinct websites. Which means they crawl and index subdomains separately.

Google discovers and prioritizes the indexation of URLs based on the links pointing to those URLs. These links can be from external domains or from other accessible subdomains on the same root domain.

For instance, you might want your blog to be considered a separate entity from your product or service. Conversely, if your site doesn't have any extensive verticals on your navigation, then you might not need to use a subdomain because you want as many links going back to your main site as possible.

Subdominator is a dependable and fast open-source command-line interface tool to identify subdomain takeovers.

What is subdomain scanner? ›

The Subdomain Scanner is one of the tools in the Acunetix Manual Tools suite for penetration testers. The Acunetix Manual Tools Suite is a set of tools for penetration testing, ethical hacking, and attack surface information gathering. The tools are free for commercial use but they are not open-source.

Sub-domain enumeration is the process of finding sub-domains for one or more domains. It helps to broader the attack surface, find hidden applications, and forgotten subdomains. Note: Vulnerabilities tend to be present across multiple domains and applications of the same organization.

Typically, subdomains are used if there is content that is distinct from the rest of the site. For example, blog.examplesite.com and shop.examplesite.com are subdomains of www.examplesite.com.

Thus, it is best to choose subdomain names that are stable and unlikely to need changing. You can use either full words, such as manufacturing, or abbreviations, such as manf, as subdomain names, but it will confuse users if some subdomains are named with abbreviations and others with full names.

subfinder is a subdomain enumeration tool written in the Go programming language. Subfinder is used for discovering passive subdomains of websites by using digital sources like Censys, Chaos, Recon. dev, Shodan, Spyse, Virustotal, and many other passive online sources.