Techniques for address point data mining are described. An address point data mining method, system, or program product can determine geographic coordinates of an address based on geographic locations of one or more user devices. Each user device can be a mobile device operable to determine a location using a global navigation system (e.g., GPS), wireless signal triangulation, or other techniques. During the course of a time period (e.g., a day or week), the user device can stay at a location for a significant amount of time. The system can crosscheck this location with a geocoded geographic coordinates of a registered address (e.g., a billing address) that is associated with the mobile device. The system can determine whether the geocoded geographic coordinates are accurate based on result of the crosscheck.