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.