WorldIP - free geolocation database, service and tools

Data returned from API, based on the client's IP address:

JSON

http://api.wipmania.com/json

{"latitude":"51.0993","longitude":"10.4537","zoom":5,"address":{"city":"-","country":"Germany","country_code":"DE","region":"-"}}

JSONP

http://api.wipmania.com/jsonp?callback=YourFunctionHere

YourFunctionHere - your name for the function

The answer looks like:

YourFunctionHere({"latitude":"51.0993","longitude":"10.4537","zoom":5,"address":{"city":"-","country":"Germany","country_code":"DE","region":"-"}})

$.getJSON("http://api.wipmania.com/jsonp?callback=?",
 function(data) {
   alert(data.address.country);
});