A system which allows the Internet address assigned to a destination equipment to be obtained, starting from its identification name, such as is carried out conventionally with the DNS protocol, and which also allows different information to be obtained on the destination equipment starting from its identification name, as for example can be information contained in databases of mobile telephony networks or in a database belonging to a data network. The system comprises a request administration means which is connected to a means of analysis of at least one parameter of the DNS protocol and at least one database message composition/reception module that is connected to at least one external database and also including means of analysis of the answer of the at least one external database and of an internal database to deliver the information requested by using the DNS protocol.