A mobile communications network in which a home location register stores two dialed numbers for a mobile station, a first number for use in a licensed radio access network and a second number for use only in an unlicensed radio access network. The core network discontinues connection of a call to the mobile station when the call uses the second dialed number and the mobile station is not located in the unlicensed radio access network. The core network may route the discontinued call to voice mail or to another number.