Mobile number locator is very popular these days and it shows the state/city of the mobile number. The mobile number locator helps a little.
But it cannot be trusted as they show wrong location of the mobile number and they also lack to provide about the present location of the mobile number.
I used it to check several mobile numbers using mobile number locator and most of the results were false. So it is not trust-able to trust the information provided by the mobile number locator. Now there are many application in the market which provide enough accurate details and location than Mobile Number Locator like truecaller etc. My experience with mobile number locator is not good so I not going to recommend it to someone.