.aq为南极国家及地区顶级域（ccTLD）的域名。.aq为在南极洲工作的组织而保留，也用于推广南极洲和南冰洋地区。这一域名由新西兰奥克兰的Mott联营公司管理。
 
一般情况下到南极洲的因特网连接只能通过卫星通信进行。

英文释义

.aq is the Internet country code top-level domain (ccTLD) for Antarctica. It is reserved for organizations that conduct work in Antarctica or promote the Antarctic and Southern Ocean regions. It is administered by Peter Mott of Mott and Associates of Auckland, New Zealand.
 
Conventional internet connection can only be accomplished through the use of a satellite connection system or satellite based devices.
 
Oddly, the Australian government's official website for Heard Island conservation efforts is "heardisland.aq", notwithstanding that Heard Island and McDonald Islands have their own ccTLD '.hm'.