Dot CO (.co)
.co is the country code top-level domain (ccTLD) assigned to the Republic of Colombia. It is administered by .CO Internet S.A.S., a strategic venture formed between Arcelandia S.A. and Neustar, Inc. Arcelandia is an entity with interests in a variety of Internet-related businesses; and Neustar is a provider of global registry and managed DNS services for top-level domains.
Though initially, the .co domain extension was meant for organizations and entities in the Republic of Colombia, since July 2010 this domain has been made available to all across the world. So, now .co is being used as an acronym for company making it an ideal alternative to the .com domain name. .CO domain names are now available for registration globally through accredited registrars.