.mobi是已启用的计划域名，也是一个新的顶级域名。其“mobi”乃“手机”的英文单词的前四个字母。.mobi主要用途是给予无线设备的门户网站的域名，也是一种WAP设备的专用域名。.mobi在2005年6月11日通过了ICANN的认证，现在由mLTD管理。该域名项目是由Google, Microsoft, Nokia, Samsung, Ericsson, Vodafone, T-Mobile, Telefónica Móviles, Telecom Italia Mobile, Orascom Telecom, GSM Association , Hutchison Whampoa, Syniverse Technologies, Visa等公司赞助。2010年，Afilias收购了mLTD公司。

The domain name mobi is a top-level domain (TLD) in the Domain Name System of the Internet. Its name is derived from the adjective mobile, indicating it is used by mobile devices for accessing Internet resources via the Mobile Web.

The domain was approved by ICANN on 11 July 2005, and is managed by the mTLD global registry. It was originally financially backed and sponsored by Google, Microsoft, Nokia, Samsung, Ericsson, Vodafone, T-Mobile, Telefónica Móviles, Telecom Italia Mobile, Orascom Telecom, GSM Association, Hutchison Whampoa, Syniverse Technologies, and Visa, with an executive from each company serving on mTLD's board of directors.