What is a subdomain?

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HelpDomainsDefinitions

What is a subdomain?

Updated: 2025/05/05Viewed times: 19732

A subdomain is a subset of a domain name. A domain name typically consists of a top-level domain (TLD) also known as a domain extension (such as .COM ) and a second-level domain (SLD). For example, our domain name is dynadot.com with "dynadot" as our SLD and .COM as our TLD. An example of a subdomain would be " example.dynadot.com" with "example" being the subdomain.

Please note that a subdomain is not the same as a third-level domain.

Want to set up DNS for your subdomains? Please follow this guideline and add the records under "Subdomain Records (optional)":
How do I set up DNS for my domain?

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