What characters can I use when registering a domain name?
A domain name can contain the numbers 0-9, the letters a-z and the hyphen characters ("-" and consecutive hyphen characters "--") however the domain names cannot begin or end with a hyphen but can.
You can use UPPERCASE or lowercase or mix cASe letters when registering a domain name, but you may occasionally run into problems if you mix cASes, so we recommend the registration in lower case letters.
A domain name can contain up to 67 characters, this 67 character limit includes the "." (dot) and the top level domain. Country level domains may have additional limitations on length and on the number of characters in a domain. Some even specifies a minimum length for a domain name, such as 3 characters or more.