A method and apparatus for managing communications in a communication network. A telephony device determines that a software application is attempting to contact an E.164 number. It then determines that the E.164 number matches at least one predetermined criterion, such as the E.164 number being a premium rate number or having a different country code to that of the device. The device then sends a query to a reputation server. The query includes information identifying the software application. The device receives a response from the reputation server, the response including a reputation relating to the software application. On the basis of the received reputation relating to the software application, the device can take further action such as preventing contact from being established.