Systems, methods, and non-transitory, machine-readable media facilitate continuation of voice services in the event of failure of a subscriber data layer in a wireless network. A cellular network core may include one or more servers. An emergency server may be configured to, during non-emergency operations of the cellular network core, collect subscriber mapping data. The subscriber mapping data may correspond to subscriber phone numbers and international mobile subscriber identities (IMSIs) for particular user equipment (UE). The emergency server may be further configured to, during non-emergency operations of the cellular network core, store the subscriber mapping data in storage, where the storage is not shared with the cellular network core. The emergency server may be further configured to, during an emergency mode, use a mapping of the subscriber phone numbers and/or the IMSIs for the particular UE to facilitate completion of one or more voice calls.