The invention relates to an Intelligent Network (16) arranged to communicate with a mobile switching center of a mobile communication network. The Intelligent Network is arranged to: receive a call message from said mobile switching center (2) comprising a calling party number and a called party number; retrieve a routing label and a tariff cluster number from a first database (28) using said called party number; modify said called party number by adding said routing label and said tariff cluster number as a prefix to said called party number to render a modified called party number; send a routing message to said mobile switching center (2) comprising said modified called party number.