Dynadot Help
Need support for your Dynadot domains, websites, or one of our tools? Use our help article directory to find the resources you need or contact our support team to get further assistance.
What is a third-level domain?
A third-level domain is the section of a domain name that is to the left of the dot of a second-level domain (SLD) that is considered a domain extension. For example, .CO.UK is a country code second-level domain (ccSLD) under the .UK country code top-level domain (ccTLD). The .UK registry supports domain registration under .CO.UK with ".CO.UK" serving as the domain extension. For example, we own Dynadot.CO.UK, so our third-level domain is "dynadot".
Please note that a third-level domain is different than a subdomain.
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