How does IDN registration work?
The VeriSign® Shared Registration System (SRS) allows a registrant to register IDNs through a registrar in any script supported by Unicode. The registrant’s IDN is stored in the Registry’s database in an ASCII-compatible representation as defined by RFC 3492 (Encoding Scheme: punycode). For example, the punycode encoding of “domain.com” will be stored as “xn--eckwd4c7c.com”. The uniqueness of a domain name registration is determined by its Unicode representation. Valid characters for IDNs are those identified within the Unicode 3.2. For more information, see Policy for IDN Code Points.