The invention relates to devices and methods for selecting network nodes in a cellular communication network. By dropping fixed connections between network nodes of different hierarchy levels, for instance, a network node of an access network has to make a selection among different core network nodes. The selected core network node requires service information on the access network node and the area serviced by the access network node. The invention describes devices for selecting network nodes and for providing service information. The devices can be implemented in the network centrally or in a distributed manner. Moreover, the invention describes network nodes cooperating with said devices, as well as methods for converting the invention.