Subdomain Finder (2024)

FAQs

Is there a way to find all subdomains? ›

Subdomain Finder scans the DNS records and supplementary databases to analyze the domain's hierarchy. Our subdomain scanner checks: DNS records (NS, MX, TXT, AXFR)

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.

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.

Optimize Your Subdomains & Subdirectories for SEO

The choice between subdomains and subdirectories largely depends on reasons outside of SEO. Both can be SEO-friendly. Whether you decide to use subdomains or subdirectories, you need to optimize them for the best chance of ranking in search engines.

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

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

A subdomain takeover occurs when an attacker gains control over a subdomain of a target domain. Typically, this happens when the subdomain has a canonical name (CNAME) in the Domain Name System (DNS), but no host is providing content for it.

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. Other popular records are related to e-commerce (shop), and community and content-related stuff (forums, wiki, community).

What is common name for subdomain? ›

If the certificate is issued for a subdomain, it should be the full subdomain. For instance, for the www and api subdomains of example.com , the common name will be www.example.com or api.example.com , and not example.com .

Each domain name can have up to 500 subdomains. You can also add multiple levels of subdomains, such as info.blog.yoursite.com.

Google Dorking

Google Dorks are one of the best ways to find extenstive information about a target. Google's search operators make it easy to narrow down the search to find more subdomains. We can use the "site" operator in the search bar to find all the subdomains that Google has indexed for a domain.

Using nslookup online is very simple. Enter a domain name in the search bar above and hit 'enter'. This will take you to an overview of DNS records for the domain name you specified.

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.

To identify DNS entries within your organization that might be dangling, use Microsoft's GitHub-hosted PowerShell tools "Get-DanglingDnsRecords". This tool helps Azure customers list all domains with a CNAME associated to an existing Azure resource that was created on their subscriptions or tenants.