Methods and apparatuses in the field of network slice management are disclosed. A method of managing, by means of an activation code management server (100), a plurality of activation codes (511 562) in a network includes steps of: providing (S31), for each of a plurality of network slices, a network slice identifier (570) in correspondence with a network slice; providing (S32) at least one VNF-product identifier (580), each VNF-product identifier (580) being in correspondence with a VNF; providing (S33) a plurality of activation code indicators (510, 520, 530, 540, 550, 560), each activation code indicator (510, 520, 530, 540, 550, 560 being indicative of one or more of the plurality of activation codes (511 562); and associating each of the plurality of activation code indicators (510, 520, 530, 540, 550, 560) with a corresponding network slice identifier (570) and a corresponding VNF-product identifier (580).