Hosting my company DNS server in Internet

[babu dheen]

Hi,
 
  Can anyone have any idea as to how we can host our own autherative DNS server for my company. For example if my company domain is "mycompany.com, we want to maintain our own DNS server so that users across world should contact our DNS server for name resolution for "mycompany.com" domain.
 
Regards
babu
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