[1] 
>
any DNS zone administration is described as
a "registry", and the terms "registry" and "zone administrator" are
used interchangeably, regardless of the actual administrative
arrangements or level in the DNS tree. 

;; [2] [CITE@en[RFC 5890 - Internationalized Domain Names for Applications (IDNA): Definitions and Document Framework]]
<http://tools.ietf.org/html/rfc5890#section-2.2>

* 関連

- [3] [[登録]]
- [4] [[レジストラ]]