What is disclosed is a method of operating a call processing system to route a voice-over-packet call between a wireless communication device and a destination device, where the destination device is located in a geographic area served by a communication network. The method includes receiving a request for the call originating from the wireless communication device, where the request comprises a destination identifier of the destination device and a location identifier of the wireless communication device. The method also includes processing the destination identifier and the location identifier to determine if the wireless communication device is located in the geographic area served by the communication network. The method also includes selecting a first route for the call from a packet network serving the wireless communication device to the communication network serving the destination device if the wireless communication device is located in the geographic area served by the communication network, and selecting a second route for the call from the packet network serving the wireless communication device to the communication network serving the destination device if the wireless communication device is not located in the geographic area served by the communication network. The method also includes transferring routing instructions for the call.