The present invention is directed to a telecommunications system 100 for routing a contact to a selected address, comprising (a) an input for receiving a contact message comprising a source address and a destination address of a subscriber communication device 116 associated with a subscriber and (b) mobility agent 160 for determining whether or not the source address in the contact message corresponds to a proxy server 128 and, when the source address corresponds to a proxy server 128, causing the contact not to be routed to a selected address and, when the source address does not correspond to a proxy server 128, causing the contact to be routed to the selected address.