The invention relates to a method for operating a billing system for billing
for services provided by a service provider and/or for transmissions of service
data via a terminal used by a subscriber using a communication network, where the
service provider is arranged outside the communication network, and the billing
system accesses subscriber profile data stored in a home location register in the
communication network. Access to the subscriber profile data is followed by use
thereof to ascertain the TCP/IP address of an account server which manages an electronic
credit belonging to the subscriber. The invention also shows a billing system for
carrying out the method.
