An Emoji Domain Name (EDN) is an International Domain Name (IDN) with an Emoji in it.  Emoji domain names, and international domain names in general, are registered using the Punycode character encoding format.  Thanks to Punycode, you are able to use UTF-8 characters in domain names.  After the Punycode conversion of an EDN / IDN from UTF-8 to ASCII, the resulting domain name starts with the prefix 'xn--' and is followed by the encoded value.  This results in each EDN / IDN having a unique Punycode representation, for example 'xn--s28h' is the emoji face with sunglasses ''.
Register .TO Emoji Domains here: .TO Domain Registration