--- title: What is a Subdomain? description: What is a subdomain? Learn how subdomains work, when to use them, and the benefits they offer for your website. --- [Skip to content](https://help.opusdns.com/what-is-a-subdomain#main-content) - [English](https://help.opusdns.com/what-is-a-subdomain) - [Deutsch](https://help.opusdns.com/de/was-ist-eine-subdomain) English Show submenu for translations [![opusdns.com](https://help.opusdns.com/hs-fs/hubfs/v2-Status%20Center.png?width=180&height=51&name=v2-Status%20Center.png)](https://help.opusdns.com/?hsLang=en) Open main navigation Close main navigation - - [English](https://help.opusdns.com/what-is-a-subdomain) - [Deutsch](https://help.opusdns.com/de/was-ist-eine-subdomain) English Show submenu for translations - [Submit Ticket](https://support.opusdns.com/) [Submit Ticket](https://support.opusdns.com/?hsLang=en) How can we help? - There are no suggestions because the search field is empty. 1. [OpusDNS Knowledgebase](https://help.opusdns.com/?hsLang=en) 2. [New to the Domain Industry?](https://help.opusdns.com/new-to-the-domain-industry?hsLang=en) 3. [Everything about Domains](https://help.opusdns.com/new-to-the-domain-industry?hsLang=en#everything-about-domains) May 28, 2026 # What is a Subdomain? A **subdomain** is a part of a larger domain that allows for the organization of different areas of a website or even different websites under a primary domain. Subdomains appear before the main domain and are separated by a dot. ### Example of a Subdomain: A common example of a subdomain would be „**blog.example.com**“. In this case, „**blog**“ is the subdomain, „**example**” is the second-level domain, and „**.com**” is the top-level domain (TLD). Subdomains allow website owners to separate different sections of a site, such as a blog, a store, or a support area. ### How do Subdomains Work? Subdomains are extensions of an existing domain and can be configured to point to different servers or directories within the website. So, if you set up a subdomain like „support.example.com,“ it can point to a specific folder or page within your main website. ### Benefits of Subdomains: 1. **Organization:** Subdomains help organize different sections of a website logically. For example, „shop.example.com“ could point to an online store, and „forum.example.com“ could point to a discussion forum. 2. **SEO:** Subdomains can also be beneficial for search engine optimization (SEO). They allow you to target different topics, helping Google index the pages more effectively. 3. **Separate Web Resources:** Subdomains offer a way to host various web resources under one domain without needing a separate domain. ### When to Use a Subdomain? Subdomains are especially useful if you want to offer additional services or content that needs a separate structure. 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