Phone Number Location Lookup is a free software which helps you to determine the geographical location of any US phone number. You can enter any US phone number and the application will search and find its location. The location is neatly displayed on the Google maps included inside the software. A very useful software to track the location from where the number is registered.
For example, with the phone number 212-778-0000, based upon the area code 212 and the exchange code 778, and using this software, you will discover that this number is located in New York, NY, and this software will provide some information about the city, such as population, median household income, cost of living index level, land area.
(It's 100% free to use, free to copy and free to share. Download this ZIP package and unpack it to your favorite location (USB stick, ...). It runs without any additional installation.)