.com is a generic top-level domain (GTLD) used on the Internet's Domain Name System. It was one of the original top-level domains, established in January 1985. It is currently operated by VeriSign.

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Yes of course .com is the GTLD and there is lot of competition for getting domain name with .com extension...i too tried getting .com extension from here Tucktail.com but i got .co.in extension domain name only...