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How to find an ISP's range of IP addresses

Hi,

I'm trying to find out what an ISP uses for it's IP address range given to connecting users.  The reason is that I want to use my home account to connect to our work server (by terminal services) and I want to restrict the firewall to only allow my ISP's range.

I've contacted the ISP but not having much luck.  Is there any way to find this out?

Regards,

Paul.
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mollari_uk
Asked:
mollari_uk
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1 Solution
 
OrbsolCommented:
Go to http://www.whoisview.com/products/whoisview/whoisview_online.php and enter an address that you know belongs to them. It should give you the whole block.

Hope this helps.
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pseudocyberCommented:
THE definitive source is ARIN.  Just put in your IP and there ya go.  http://www.arin.net/
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pseudocyberCommented:
Or if you're in Europe:  RIPE.  http://www.ripe.net/perl/whois
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