Abstract: Systems, methods and computer program products for utilizing location information in a virtual private branch exchange (vPBX) system are described. In some implementations, the vPBX system can use the location information to determine an availability status of a user of a mobile device (e.g., out of the office, in the office, at home, busy, and the like). The vPBX system can obtain the geographic coordinates of the mobile device and correlate these coordinates with known coordinates for locations associated with the user (e.g., the user's office, home, or other predefined locations). An inference of the user's availability can then be determined based on the correlation (e.g., whether the user is currently out of the user's office, at the user's home, or at another location). The user's availability can be made available to other users associated with the vPBX system, and can be used for call management (e.g., routing).