There is a site [url removed, login to view] that I found most accurate to get cell phone provider info.
By entering a cell number and clicking the "Cellphone Info' button I got accurate info.
So I want to have the same thing in a Delphi app, or C#.
I know there are some other lookup tools around, but I found this site to be the most accurate and info is upto date.
any question feel free to ask