The present invention concerns a method to perform a telecommunication between a caller terminal and a callee terminal identified by an identification code, such as a phone number.Method wherein it comprises the steps of: collecting routing information related to the identification code of the callee, after entering said code at the caller's terminal and before activating the telecommunication or establishing the telecommunication link, then displaying at least a part of said collected routing information at the caller's end, for example directly on the caller terminal and finally either activating the telecommunication in order to establish the telecommunication link corresponding to the entered code or cancelling the current attempt to establish a telecommunication link based on said dialed code.