1. A method comprising: determining a significant location of a mobile device, the significant location including a geographic location at which the mobile device has stayed for at least a threshold amount of time; determining, based on account information of a user of the mobile device, a registered address and assumed geographic coordinates of the registered address; determining whether a distance between the significant location and the assumed geographic coordinates satisfies a match threshold distance; and upon determining that the distance satisfies the match threshold, designating the assumed geographic coordinates as confirmed geographic coordinates to be associated with the registered address, wherein the method is performed by one or more computing devices.