is there a way to determine/find the ISP from the user?

[janton]

Hello Hello,

I would like to know if there is a way to find what ISP (internet service provider) the user has. Our application is connected with the internet and need some different settings for some special ISP's.

I know i visit some sites and they know what ISP i have, so i was hoping there was some simular way to determine the ISP of the user.

Any advice or comment is welcome.

[squidge]

You can have a database which maps IP addresses to ISPs, or you can do live ISP lookup by using Whois database. Neither will be 100% reliable.