How to Find Subdomains of a Domain? | Complete Guide (2024)

How to Find Subdomains of a Domain? | Complete Guide (1)

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Discovering subdomains of a domain is crucial for website owners and security enthusiasts. It allows individuals to identify all the domains on one’s website. Finding subdomains helps avoid potential security risks and ensures your website is visible and accessible. However, searching for subdomains can sometimes be daunting, especially for individuals needing more technical expertise.

This article will provide you with top-rated strategies that experts use to identify domain subdomains. With this guide, you will be able to learn how to search for and find all subdomains of a domain. Get ready to enhance your website’s visibility online with our comprehensive and step-by-step guide.

What is Subdomain Exactly?

A subdomain is a division or extension of a domain name, which can be separated or added to the main domain with a dot. It functions as a separate entity from the main domain but is still considered part of it. By creating a subdomain, web developers and website owners can allocate space in their domain for specific purposes, such as a blog or an e-commerce page.

Furthermore, a subdomain can organize content, facilitate navigation, and enhance the user experience. One can use various tools such as DNS queries, online search engines, and website scanners to find subdomains of a domain. Understanding subdomains is crucial for building and maintaining a strong online presence in digital communication.

Subdomains are often used to provide a more personalized experience for visitors, allowing them to easily find the pages they want without searching the entire domain. Using subdomains, organizations can also present their website in multiple languages and create targeted content for particular audiences.

Additionally, subdomains help optimize SEO by allowing webmasters to optimize content and link structure. As such, optimizing subdomains can be an effective way of driving more traffic to a website.

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How to Find Subdomains of a Domain?

As we all know, subdomains are websites or pages related to the primary domain name. With the rise of online presence, it is necessary to be able to find all the subdomains of a domain. So, how to find subdomains of a domain? Well, there are a few methods that you can resort to.

One of the most basic and recommended ways is to use a subdomain scanner – an online tool that does a deep scan of the website and returns a comprehensive list of all the subdomains under it. Additionally, using Google dorks, crawling tools, and subdomain takeover tools can make the process even more efficient. Understanding and leveraging these methods can make the task of finding all subdomains of a domain much easier and faster.

It is important for businesses to ensure that all subdomains are being used for the right purpose. It is crucial to ensure that no existing subdomains have been compromised or taken over by an external party. Regularly checking and monitoring your subdomains helps you stay one step ahead in digital security.

Furthermore, creating dedicated subdomains for specific purposes can help potential customers and visitors differentiate between all the services offered by the company. In essence, subdomains play an important role in domain management and should be given attention accordingly.

How to Find Subdomains of a Domain Online?

How to Find Subdomains of a Domain? | Complete Guide (2)

Exploring a domain’s aspects is essential for a complete website development journey. To do so, one must know how to find subdomains of a domain. This process is crucial, as it helps identify all the auxiliary services associated with the domain. The process may appear complex, but there are various ways to find all subdomains of a domain. You can use specialized tools such as DNSDumpster, Sublist3r, or Hqdnscatcher.

Additionally, using the command prompt to perform a range of systematic queries like nslookup, ping, and dig can also provide accurate results. It’s essential to opt for a customized approach depending on the task.

Finding all domain subdomains can improve your website’s security and ensure constant monitoring. With this, it becomes easier to identify malicious activity. The key takeaway is that the more comprehensive your approach to domain research, the better outcomes you’ll receive in terms of website security and performance.

Related: Subdomain vs Subdirectory


DNSDumpster tools offer a powerful solution for those seeking to find all domain subdomains online. With this tool, you can quickly and easily discover a variety of subdomains associated with a particular website, providing valuable insights into the structure and hierarchy of a website’s online presence.

Designed with a user-friendly interface, DNSDumpster offers an efficient and effective approach to finding subdomains. Whether you are a cybersecurity professional seeking to identify potential vulnerabilities or a web developer looking to understand a website’s architecture better, this tool is a must-have for anyone seeking to unlock the hidden potential of online domains.

How to Find Subdomains of a Domain? | Complete Guide (3)


Sublist3r is an indispensable tool for anyone who wants to uncover all domain subdomains online. With this powerful software, users can effortlessly identify and track down subdomains that may have been previously overlooked. Designed with efficiency and accuracy in mind, Sublist3r boasts an impressive range of features that enable users to obtain a comprehensive list of subdomains associated with a given domain.

Whether you’re an IT professional, cybersecurity expert, or interested in online research, Sublist3r can enhance your workflow and help you find subdomains of a domain efficiently and effectively. So why wait? Start using Sublist3r today and unlock a world of possibilities.

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NMMAPPER tools are an essential resource for anyone looking to explore and understand the full scope of a domain. These tools provide a comprehensive platform to find all domain subdomains online, providing powerful features to view subdomains in vivid detail. From domain mapping to DNS analysis, NMMAPPER tools provide a wealth of insight into a domain’s online presence and functionality.

With a formal and creative tone, these tools tap into the full potential of domain analysis and offer a unique perspective on website functionality. Whether you are looking to map out the various subdomains of a domain or gain deeper insights into its DNS functionality, NMMAPPER tools are a must-have for researchers, web developers, and businesses alike.

How to Find Subdomains of a Domain? | Complete Guide (4)


In conclusion, finding subdomains of a domain has become an essential part of digital security. While it may seem overwhelming, it can be done easily with the right resources. Online subdomain finders have made the process painless and effective. Using them, you can find all domain subdomains online in no time.

Additionally, monitoring your subdomains is crucial to managing your online presence and reducing the risk of potential cyber-attacks. These tips have helped you understand how to find subdomains and monitor them regularly.

How to Find Subdomains of a Domain? | Complete Guide (2024)


How to Find Subdomains of a Domain? | Complete Guide? ›

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.

How does Google find subdomains? ›

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.

How many subdomains does a domain have? ›

Each domain name can have up to 500 subdomains. You can also add multiple levels of subdomains, such as A subdomain can be up to 255 characters long, but if you have multiple levels in your subdomain, each level can only be 63 characters long.

How do subdomain finders work? ›

The Subdomain Scanner uses the target domain's DNS server (or any other DNS server specified) to scan the DNS records for possible subdomains. While scanning, the Subdomain Scanner will also automatically identify if the domain being scanned uses wildcards (*.

Do subdomains have separate DNS records? ›

A subdomain is an additional part to your domain name that is separate from the parent domain, meaning that you have a different DNS environment and records.

How to find all subdomains from a domain? ›

There are several ways to find subdomains:
  1. Manually, by using the site:* operator in Google.
  2. By checking DNS records using the nslookup command.
  3. By using our online subdomain scanner or similar tools.

Which website provide information about subdomains? ›

NMMAPPER. An online tool to find subdomains using Anubis, Amass, DNScan, Sublist3r, Lepus, Censys, etc.

Are subdomains free with domain? ›

You don't have to pay for subdomains if you already have a domain name. However, you may have to pay extra for a hosting plan that includes subdomains.

What does a subdomain URL look like? ›

While a subdomain will appear before your TLD, a subdirectory link will include the subdirectory name after the original TLD. For example: Subdomain example: Subdirectory example:

How to get a subdomain? ›

To create a subdomain, please do the following:
  1. Go to your Domain List and click Manage next to the domain:
  2. Select the Advanced DNS tab:
  3. Find the Host Records section and click on the Add New Record button (not able to edit Host Records?):
  4. Select the way your subdomain will be connected from the list below:

What is subdomain lookup? ›

A Subdomain Finder is a subdomain enumeration tool that helps you discover subdomain hosts (aka subdomain FQDNs) which serve specific functions for your target (e.g. hosting public websites, private subdomains for testing web apps, URLs where you can find backups, etc.).

What is a subfinder? ›

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.

How do I track a subdomain in Google Analytics? ›

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 and, then enter in the settings of GA4. Save the changes.

Does CNAME affect subdomains? ›

A CNAME record is an alias for a subdomain. When you configure a CNAME record for a subdomain, DNS queries are no longer sent for the subdomain but for the domain or subdomain specified in the CNAME record to the appropriate name server.

Do subdomains affect domain reputation? ›

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.

Do I need a DMARC record for subdomains? ›

By default, the DMARC policy that is set for an organizational domain will apply to any subdomains—unless a DMARC record has been published for a specific subdomain. However, domain owners may set separate policies for all subdomains with the “sp” tag (for subdomain policy). It uses the same syntax as the p tag.

Does Google penalize subdomains? ›

Google will not penalize international websites that exist on separate subdomains if they have duplicate content. Instead, it will recognise the pages are identical and in most cases index both, but will only pick one URL to show in search results.

How does Google rank subdomains? ›

Google SEO. Subdomain sites can rank well on Google if they have relevant and high-quality content, good user experience, and strong backlinks. However, subdomains are considered to be separate entities from the main domain, so they do not receive the same level of authority and trust from search engines.

Does Google see subdomains as different sites? ›

Google has always treated subdomains as different sites, separate from the main domain. This is evident within Google Search Console, where subdomains have to be verified separately from the content that exists under the main domain website.

Does Google allow subdomains? ›

Welcome to the Google Workspace Admin forum. Yes you can do this. Sub domains are treat no differently to regular domains.


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