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.com
VeriSign is the authoritative directory provider of all .com, .net, .cc, and .tv domain names, and an industry leader in Information Services to globalize access to the Internet.  verisign.com

 
com has lots of definitions on the internet and it has very wide range or uses. Which maybe the reason that it's the most domain name extension used on the web. Besides that it was one of the first extension used on the internet. you have the right to register the .com domain for 1 to 10 Years.
Introduced 1985
TLD type Generic top-level domain
Status Active
Registry VeriSign
Sponsor None
Intended use Commercial entities (worldwide)
Actual use Used for virtually any commercial or non-commercial website and is generally accepted as the standard for TLDs
Registration restrictions None
Structure Registrations at second level permitted
Documents RFC 920; RFC 1591; ICANN registry agreement
Dispute policies UDRP
Web site VeriSign COM NET Registry
source: wikipedia.org
 

Where Can you register a .Com domain:

Registration price ($)
alregister.com 9.99$
101domain.com 8.95$
Enom.com  
Godaddy.com 9.99$
register.com  
*Note: the prices could be changed After writing this Article on Domainw.net So by visiting the above sites you can get the correct price.
 

For more info about .Com domain extension you can visit these links:

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