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.co is the Internet country code top-level domain (ccTLD) assigned to Colombia. It is administered by .CO Internet S.A.S.〔(Delegation Record for .CO ). Internet Assigned Numbers Authority. Retrieved February 6, 2011.〕 , there are no registration restrictions on second-level .co domains; any individual or entity in the world can register a .co domain. .co has become increasingly popular among tech startups. The .co domain is also used by many established brands for social and mobile media, such as Twitter (t.co), Google Inc. (g.co), Amazon.com (a.co), American Express (amex.co) and Starbucks (sbux.co). 〔http://www.go.co GO.CO〕 .co domain names are available for registration globally through accredited registrars. .CO Internet S.A.S from Bogotá, Colombia, was appointed as the manager for the .co TLD through a public procurement process that took place in early 2009. .CO Internet received the re-delegation approval as the manager of the .co TLD by ICANN on December 9, 2009, and received formal confirmation of the request by the United States Department of Commerce on December 23, 2009. ==Second-level domain names== When they took over administration of the .CO domain, .CO Internet S.A.S. implemented new domain policies that were more flexible than the historic ones that had been administered by the University of the Andes. The new policies were adjusted to international best practices and defined in consultation with local and international communities. With the new policies, Colombia would be able to sell second-level domain names to the world, such as widgets.co, where previously only third-level domain names were available, such as widgets.com.co. To celebrate the launch of second-level domains, the registry auctioned the first single letter .CO domain name ("e.CO" ) during Internet Week on June 10, 2010. A video of the auction can be seen here:〔(e.coon internetweekny - live streaming video powered by Livestream )〕 For a purchase price of $81,000, the winner of the auction was internet entrepreneur Lonnie Borck of B52 Media.〔(Techcrunch )〕 Proceeds were donated to a charitable cause of the winner's choice. In addition to e.co, the other single letter .CO domain names that have been allocated include: , more than 1 million .CO domains had been registered by people in over 200 countries and territories worldwide.〔 As of January of 2014, that number has grown to over 1.6 million .CO domains registered. With respect to search engine optimization, Google confirmed that "it will rank .co domains appropriately if the content is globally targeted". Google has also confirmed that it will treat .co as a gccTLD for purposes of indexing and seo. More information about .CO and SEO can be found on the Registry's consumer facing website, including videos from Google's SEO expert Matt Cutts confirming Google's positive treatment of .CO for SEO purposes.〔(CO and SEO | Search Engine Optimization | GO.CO )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「.co」の詳細全文を読む スポンサード リンク
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