What Is A Valid Domain Name?

Issue

What is a valid domain name?

Solution

The only valid characters for a domain name are letters (a-z), numbers (0-9) and hyphens (-). A domain name can be up to 67 characters long -- including the 4 characters used to identify the Top Level Domain.

Below are examples of acceptable domain names that we can register:

  • sample.com
  • sample.net
  • sample.org
  • averyveryverylongname.net

Below are examples of unacceptable domain names that we cannot register:

  • www.sample.org
  • http://sample.com
  • illegal_a b characters.net (the underscore and the space are not acceptable characters in a domain name)
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