Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

To my little knowledge, my home computer can connect to internet because the ISP assigned a dynamic IP address to my router. Then through NAT, the router assign an dynamic IP address for my home computer.

So now my question is where does the ISP obtain their own IP address from to connect to internet?

share|improve this question

From a block of addresses provided by an address provider such as ARIN or RIPE.

share|improve this answer
So if I want to become an ISP. That means I would need to contact ARIN or RIPE for registering an IP address? – root Dec 19 '10 at 4:31
You would have to contact them for a block of addresses. – Ignacio Vazquez-Abrams Dec 19 '10 at 4:33
Oh, and be quick about getting your addresses. They are going fast, in a short time they will all be gone. – Zoredache Dec 19 '10 at 6:39
61 days to go .. (approximately) .. – Helvick Dec 19 '10 at 20:16

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.