ccTLD（国家代码顶级域名）
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ccTLD（国家代码顶级域名）是根据ISO 3166-1 alpha-2代码分配给特定国家或地区的两字母[[tld|TLD]]。每个ccTLD由指定的国家机构管理，注册政策各有不同——有些对任何人开放，有些则要求在本地有实体存在。
示例
.uk (United Kingdom), .de (Germany), .jp (Japan), and .br (Brazil) are ccTLDs. Some like .io and .ai are used creatively by tech companies.