Subdomain Finder (2024)

FAQs

Is there a way to find all subdomains? ›

Subdomains aren't directly bad for SEO, but they're not always the most strategic choice.

It's a cyber threat executed when an attacker gains control of a legitimate subdomain that's no longer in use, then cleverly exploits the forgotten or misconfigured dangling DNS to host their own content on the previously used zone.

Characteristics and Parameters of a Subdomain

A domain can have up to 500 subdomains. You can create multiple levels of subdomains such as store.product.yoursite.com, test.forum.yoursite.com, etc. Each subdomain can be up to 255 characters long, but for multi level subdomains, each level can only be 63 characters long.

Subdomains allow webmasters to organize their content, so they can maintain an ecommerce store on one domain, for example, and a blog on another. However, Google treats subdomains as separate sites.

Google Considers Subdomains as Separate Standalone Sites

Google has always treated subdomains as different sites, separate from the main domain.

A sitemap is a file of your site's pages, links and other information that helps Google read and index your site. Each subdomain has its own dedicated sitemap that needs to be submitted to Google individually.

The most common subdomain is “www” or “world wide web.” The subdirectory points users to the main directory of a website—in other words, where your homepage and other core pages live. Other subdomains work to create distinct parts of a site. For example, Google's root domain is www.google.com.

What is subdomain finder? ›

Subdomain finder is used to identify subdomains associated with a domain name for various purposes, such as security audits, SEO research, and penetration testing.

Subdomain stripping is the process of removing the subdomains from the main domain and delivering the emails to the main domain directly.

Subdomain takeover can have severe legal implications, as attackers may engage in illegal activities or host malicious content on compromised subdomains.

Dangling DNS records are misconfigured DNS records that point to non-existent or expired services. These records can be a security risk, leaving companies vulnerable to subdomain takeovers. Many companies create new subdomains regularly for testing purposes or to point to third-party services.

Create subdomains for specific users or clients

You can create a subdomain that is specifically intended for them to give an idea of what their new website might look like. This is hosted on your own main domain, while retaining ownership of the subdomain.

Subdomain finder is used to identify subdomains associated with a domain name for various purposes, such as security audits, SEO research, and penetration testing.

The short answer is yes, Google can and will index and rank subdomains unless you explicitly take steps to ensure they're excluded from its index. Google's entire business model is based on discovering content. The same goes for all search engines.

Go to GA4 admin > Data Streams > Select your web data stream > Configure Tag Settings > Show More > List unwanted referrals and then enter your main domain there. For example, if your subdomains are subdomain1.example.com and subdomain2.example.com, then enter example.com in the settings of GA4.

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.