Well first of all, this ISP DB is an Cube for its self. containing only IP Start number, IP End number, Country ID, ISP name and ISP product.
The way to do it, is reverse lookups on the net. nothing more and nothing less. its called whois and there are millions of whois servers out there.
And if you think, ISP's changes public ips, evey month, you couldnt be more wrong.
If you know anyting about the global isp system, you wouldnt have made that question.

And ones again, please do sign up, in this forum TEO, else your credibility to this project, isnt very big.
