The only characters allowed in a domain name are the 26 letters of the alphabet, numbers 0-9 and dashes (-). A domain cannot begin or end with a dash, but it can contain a dash. The Internet Corporation for Assigned Names and Numbers (ICANN) serves as the governing body for domain name registration. ICANN is currently allowing up to 63 characters, but we would recommend you stay below 20 characters. Domain name registration applications may be rejected for reasons other than the above, especially if they are perceived to infringe trademarks or copyright law.