.ck为新西兰海外属地库克群岛国家及地区顶级域（ccTLD）的域名。

英文释义：

.ck is the Internet country code top-level domain (ccTLD) for the Cook Islands.

Registrations are within these second-level categories:
.co.ck: business organisations
.org.ck: not-for-profit organisations
.edu.ck: educational institutions
.gov.ck: government agencies
.net.ck: Internet Service Providers
.gen.ck:
.biz.ck: Business related pages for the Cook Islands
.info.ck: Information pages relating to the Cook Islands