Where does Comcast/ISP get their internet from?

Where does Comcast/ISP get their internet from? How to become your own isp? If you lookup micorosoft.com in ip-adress.com, you'll see that the ISP for Microsoft.com is Microsoft...??? So, where does an ISP's internet come from???
davidlu766Asked:
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techzterConnect With a Mentor Commented:
How to become an ISP is a pretty involved question. Long story short I wouldn't recommend doing it unless you have a huge amount of capitol up front. Unless you become a reseller of another providers service. The profit margin will be small but if you can get enough subscribers you may be able to make it worthwhile.

ISP's buy their service from basically the next step up of internet providers. They are referred to as major internet backbone providers.
http://www.webopedia.com/TERM/B/backbone_provider.html
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Kamran ArshadIT AssociateCommented:
Hi,

There are backbone providers which provide Internet to regional providers and then it is distributed by local ISPs. In my scenario, I am using NTC as my ISP which is connected to PIE as regional provider which is connected to SEA-ME-WE3 which is backbone.
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techzterCommented:
davidlu766 do you have anything further, or have we answered your question?
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