My wireless router shows the IP address is
113.46.75.*, which some websites like ip138.com, www.ip.cn show as my IP.
But other websites, like googling for "what is my ip", www.whatismyip.com, www.whatsmyip.org, show that my IP is
I am very curious why this happens and how is it possible.
So, why do different websites show that I have different IPs?
Plus: I changed my IP address several times (restarting the modem) and all addresses is like
113.46.*.*, but my IP address does not change when googling for "what is my ip".
My ISP is a small company, so I think it is true that when visiting some websites, I am NATted or proxied to some IP addresses which have access to those websites -- not to avoid firewall though, since I am still blocked from some websites.
But I still want some more information or resources to support our guess. Thank you!