This is fairly close to my actual location:
http://sendstudio.ip-adress.com/link.php?M=59811&N=57&L=2&F=H
Where are you located
http://www.ip-adress.com/
I guess it would not detect mine recently, because Iran has started 2 new data-center and Iranian users/clients don't connect to internet with their own IP anymore...
Iran is using these data-centers to have a more strong content filtering and all Iranian connect to internet with same IP!! what we have inside Iran is intranet connect to Iran data-center and then access to internet...
it's not matter and is good in some reason!! for example it's good because it would be more diffuclt for hackers to find my real IP and it's bad sometimes because it cause some problem during download files from free servers such as RapidShare because it detect all Iranian clients as a user and says you are currently downloading a file and without premium account we cannot download from that server.