Implementations relate to systems and methods for determining a location of a mobile device. The mobile device can query other mobile devices within service range for identification information, and send the identification information to a remote server for storage therein. The remote server can receive location information from other mobile devices corresponding to the identification information. The mobile device can send a location query to the remote server, which can determine or calculate a location of the mobile device based on the identification and/or location information of the other mobile devices. The remote server can provide the location of the mobile device to the mobile device for use in associated mobile applications.