WIPmania provides a free WorldIP plugin for Firefox users. The plugin displays up-to-date information about physical location of a Web server you are currently visiting. Plugin is based on API, always returning the most current information.
WorldIP plugin is highly configurable. It can display your own IP address and your location, makes it possible to learn more about the country where a particular server or IP address is located by transferring you to WIP-Map information system.
WorldIP often shows different results from similar add-ons, because they are using the database of Maxmind based on whois, but WorldIP displays real geographic location of an IP address. It is easy to check, just trace this IP address.
Most often users are interested in results on Google's servers
Google has data centers located all over the world and shows a website to the user from the nearest server. WIPmania shows the real countries for Google where these data centers are.
And, according to whois, United States of America (US) is always displayed for Google, because their head office is in Mountain View, California, US
There are some CDN-Hosters (among them, the largest one is Akamai). They have also servers worldwide and also show the website to the user from the nearest server. WorldIP shows the real country of the server as well, and not the US, AP or EU, like others databases and add-ons.
For example: "www.seagate.com" is displayed for Japan's users from the server in Japan (with IP address 22.214.171.124). For users from Canada it is shown from Chicago (126.96.36.199).
Opera mini uses the proxy servers for Internet access, some of them are located in Norway. WIPmania displays an external IP address and country of these proxies (Norway ), you'll see by accessing the Internet on your mobile phone, and not the country where you are from.
If the country is not displayed (Unknown, Asia, Europe ), most likely it happens because:
a) the IP address is not accessible from the Internet, because of the internal network (corporate or of your internet provider), or
b) the network is new, so that it is still unknown for all core routers on the planet. (BGP route announcements about the new network can be spread over several hours around the planet).
с) For the routing to this IP address "anycast" technology is used. Which means, the same IP address is located in different countries. As in the case of the ordinary CDN, the website is shown to the user from the nearest server, with one difference, that all these servers have the same IP address.
For more details, Wikipedia about "Anycast"
An example: CDN-hoster Edgecast.com (their servers are in America, Europe, Asia).
Why WorldIP is different to other add-ons and services in showing country
Menu and submenu "Ping"