IANA
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IANA（互联网号码分配机构）是[[icann|ICANN]]负责维护DNS根区、协调向地区互联网注册机构分配IP地址以及管理协议参数注册的职能部门。
示例
IANA maintains the authoritative list of all TLDs at the Root Zone Database (iana.org/domains/root/db).