What are the registration restrictions for .co domain names?
Domain names must meet the following specifications:
Contains a minimum of 3 characters and a maximum of 63 not including the .co suffix
Contains letters “a-z, “A-Z”, numbers “0-9” or the special character hyphen. However, a hyphen may not begin or end a name, nor have two or more consecutive hyphens in the 3rd or 4th position





