Is someone giving you numerous missed calls? Did someone called you up and you couldn't figure out from which place was it? Then here is the thing for you.
Enter the first 4 digits of the ten digit mobile number (No need to include the country code), and you will get the Telecom Circle (State / Metro). If you would like to know more details about the caller you can TAP ON the result and it would guide you to another page and from there on you can find the name of the person, network provider and location of the caller.