Various arrangements for activating a wireless device on a wireless network are presented. A request to attach to the wireless network may be received from the wireless device. The request may specify an international mobile subscriber identity (IMSI). An authentication message may be transmitted to a detection device of the wireless network. The IMSI may be compared to a set of stored blocked IMSIs. Each IMSI of the set of stored blocked IMSIs may be prohibited from being used to access the wireless network. It may be determined that the wireless device may that corresponds to the IMSI is permitted to be attached to the wireless network. In response to determining the wireless device is permitted to attach to the wireless network, authentication of the wireless device may occur.