Are there rules on the format of domains?

Category: Domain-only Accounts Domain registration / renewals
When choosing a domain, the following rules apply:

  • Domains can only contain alphanumeric characters (a-z and 0-9) and dashes (-), but cannot begin or end with a dash.
  • Domains can be up to 63 characters in length.
  • All international domains must have a minimum of three characters.
  • All .uk domains must have a minimum of two characters - names containing two letters are not allowed (e.g. but two characters are permitted (e.g.
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