Abstract: A new prefix, an international mobile call prefix, is provided in a telecommunications network, such as PSTN, for routing the PSTN originating international call to a foreign mobile subscriber. When a local PSTN exchange receives the international mobile call prefix in the dialed telephone number, it will route the call to a predetermined destination in the same country. The predetermined destination is a network element having a capability of making international routing information interrogation to a home PLMN of a called foreign mobile subscriber. Upon receiving the routing information from the home PLMN the call will be routed to the current location of the called foreign mobile subscriber according to the routing information. As a result, unnecessary international legs in the call can be avoided when the called mobile subscriber is roaming abroad.