Embodiments of the present invention are directed to methods and systems for handling emergency calls from a mobile VoIP device. According to one embodiment, handling an emergency call from a Voice-over Internet Protocol (VoIP) device can comprise registering a physical address associated with the mobile VoIP device, periodically determining a current location of the mobile VoIP device, dynamically updating a current address associated with the mobile VoIP device based on the determined current location of the mobile VoIP device, and initiating an emergency call from the mobile VoIP device, the emergency call selectively using either the registered physical address or the dynamically updated current address.