How to do maps IPs to networks/ISPs?

[toplisek]

I have PHP code to echo ISP.

Issue is that I need to do maps IPs to networks/ISPs


How to do in correct way?

[coopster]

You would need a list of the IP address ranges for each ISP and if the IP being analyzed falls in the range for any of the known ranges you know the ISP.

But wait, you stated that you already have the ISP. If you have the ISP and the visitor is hitting you then you would also have their IP address, you could build your own database.