A VCC in a telecommunications network which also has an HLR, an S-CSCF, and an IMS mobile or UE. The VCC includes a network interface unit of the VCC which receives an indication that the mobile is registering with the network or attempting to make or receive an IMS communication session. The VCC includes a processing unit of the VCC which assigns a VDN or a telephony network routing identifier for the mobile, and assigns a VCC point code. The VDN is sent from the network interface unit through the network to the UE or the mobile. The VCC point code for the mobile or the UE is sent from the network interface through the network to the HLR to update the mobile's or UE's profile data in the HLR. A method for assigning a VCC to an IMS mobile or UE in a telecommunications network which also has an HLR and an S-CSCF.