Find All Subdomains (2024)

FAQs

Is there a way to find all subdomains? ›

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.

Find Subdomains of a Domain with NsLookup:

Replace “example.com” with the domain name you are interested in. This command will return a list of the authoritative name servers for the domain, which can often include the 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) DNS enumeration. SSL certificates.

subfinder is a subdomain discovery tool that returns valid subdomains for websites, using passive online sources. It has a simple, modular architecture and is optimized for speed. subfinder is built for doing one thing only - passive subdomain enumeration, and it does that very well.

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.

SubDomz is an automation tool for finding the subdomains of the given target or targets passively. It uses multiple tools and various online search engines and services in parallel to find subdomains effectively and sort and save them in an organized way.

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.

Some of the disadvantages include: - It can confuse website visitors about where they should go to find your main content. - It can be more challenging to track visitor traffic and engagement with different types of content. A subdomain isn't as valuable as a “real” domain.

Are subdomains worth it? ›

Are subdomains bad for SEO? Subdomains aren't directly bad for SEO, but they're not always the most strategic choice. Google states that subdomains and subdirectories are both fine, but subdomains are crawled and tracked separately.

Your subdomain reputation(s) can impact base domain reputation, but the impact between subdomains will be small. Subdomains are not a way to avoid a bad domain reputation. Instead, they will help differentiate your traffic while maintaining a clear relationship with your main domain.

You should be able to sort your list of DNS records by 'Name' and thereby get a list of all the subdomains (subdomains will be everything that isn't @). You can also sort by 'Type' and look only at those with the CNAME type if you want to exclude TXT records and MX records.

Each name has its own DNS records – really, the whole point of subdomains is that each of them can have different records (and point to different IP addresses) than the main domain. Because of that, each name is cached independently.

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.

By search engines

Search engines like Google supports various advanced search operators to refine search queries. These operators are often referred to as Google Dorks. We can use site: operator in Google search to find all the Subdomains that Google has found for a Domain. Lets take an example on “site:vulnweb.com”.

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.

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.