Location filtering using mobile country code

A system, comprising:

• a mobile device configured to perform operations comprising:
• receiving identifiers of one or more access points of a wireless communications network and a current mobile country code (MCC);
• identifying a polygon that is a bounding box of a geographic area that corresponds to the current MCC;
• selecting a set of access point locations from a location database using the received identifiers, where the access point locations are inside the identified polygon, wherein selecting the set of access point locations comprises:
• identifying an outlier from the access point locations, including identifying an access point the identifier of which is received by the mobile device wherein, according to a location record stored on the mobile device, the location of the access point is located outside of the polygon that corresponds to the current MCC;
• and
• filtering out the outlier from the set of access point locations;
• and
• determining a current location of the mobile device based on an average location of the selected set of access point locations.

A computer program product tangibly stored on a storage device, operable to cause a mobile device to perform operations comprising:

• receiving identifiers of one or more access points of a wireless communications network and a current mobile country code (MCC);
• identifying a polygon that is a bounding box of a geographic area that corresponds to the current MCC;
• selecting a set of access point locations from a location database using the received identifiers, where the access point locations are inside the identified polygon, wherein selecting the set of access point locations comprises:
• identifying an outlier from the access point locations, including identifying an access point the identifier of which is received by the mobile device wherein, according to a location record stored on the mobile device, the location of the access point is located outside of the polygon that corresponds to the current MCC;
• and
• filtering out the outlier from the set of access point locations;
• and
• determining a current location of the mobile device based on an average location of the selected set of access point locations.