A method and system for handling calls to emergency telephone numbers by a VoIP telephone that is configured as an extension to a home telephone. The VoIP telephone is provided with a home telephone number that is different than the home telephone number. The location of the VoIP telephone is maintained in a caller ID location database and is regularly updated when necessary. Location updates are made at least when the VoIP telephone registers using a different IP address than was used for the most recent communication. The system is configured to enable the VoIP telephone to ring when a call is placed to the home telephone number. In addition, non-emergency calls from the VoIP telephone are accompanied by caller ID information associated with home telephone. In this way, VoIP telephones may be configured as extension telephones and used to make emergency calls, even when being used nomadically.