The present disclosure provides methods (600, 700), network nodes (1000, 1100, 1200, 1300), and computer readable media for supporting set information in context retrieval. The method (600) at a first network node includes: transmitting (S601), to a second network node, a request message for a UE context of a third network node that is registered to the second network node; and receiving (S603), from the second network node, a response message at least comprising the requested UE context of the third network node and set information of a set to which the third network node belongs.