A service (LD) according to the invention is disclosed for managing lists in a packet-oriented network (LAN) for end devices (EG) of the network, said service providing a first (blacklist) and second (whitelist) list (L1, L2) of identifiers (id, rn) in which one or no unwanted speech advertising SPIT or unsolicited bulk communications are to be expected. A call is directed to the service (LD), and the identifier (idx) of the call is compared to the identifiers (id, m) in the lists (L1, L2). A call whose identifier (idx) is not contained in the lists (L1, L2) is directed to the addressed end device (EGx) and transmitted following acceptance. After determination of a call with or without unwanted speech advertising (SPIT), a first or second piece of information (z1, z2) inputted to the end device (EGx) is transmitted to the service (LD) in the packet-oriented network (LAN), and the identifier (idx) of the call is assigned to the first or second list (L1, L2). The handling of the lists, and therefore the comfort for the subscriber, is increased by the central management of the lists (L1, L2) by a service (LD) in the network and by simple input to the end device.