A telecommunications network for performing a handover of a communication session between a packet-switched access network and a circuit-switched access network, comprising: a plurality of Emergency Access Transfer Function, EATF, network devices, an interrogating Call Session Control Function, I-CSCF, network device; a computer-readable memory configured to store one or more addresses of one or more user equipment devices in association with an address of at least one of a plurality of Emergency Access Transfer Function, EATF, network devices, each EATF network device being capable of proxying signaling traffic for one or more emergency communication sessions; a Mobile Switching Center Server, MSS, configured to receive a handover request associated with an emergency communication session of user equipment and, in response, initiate a session transfer of the emergency communication session toward an Interrogating Call Session Control Function, I-CSCF, network device; the plurality of Emergency Access Transfer Function, EATF, network devices, each comprising: a respective processor; the I-CSCF network device (400, 226) is configured to: query the computer-readable memory using an address of the user equipment to determine whether the address of the user equipment is stored in the computer-readable memory; obtain respective addresses of at least some EATF network devices of the plurality of EATF network devices in response to the initiated session transfer; transmit respective handover queries to the at least some EATF network devices using the determined respective addresses in response to the address of the user equipment not being stored in the computer-readable memory; and the plurality of EATF network devices further configured to in response to a first handover query of the respective handover queries, provide an indication of whether the emergency communication session is being proxied by at least one of the one or more processors of the respective EATF network device. a plurality of Emergency Access Transfer Function, EATF, network devices, an interrogating Call Session Control Function, I-CSCF, network device; a computer-readable memory configured to store one or more addresses of one or more user equipment devices in association with an address of at least one of a plurality of Emergency Access Transfer Function, EATF, network devices, each EATF network device being capable of proxying signaling traffic for one or more emergency communication sessions; a Mobile Switching Center Server, MSS, configured to receive a handover request associated with an emergency communication session of user equipment and, in response, initiate a session transfer of the emergency communication session toward an Interrogating Call Session Control Function, I-CSCF, network device; the plurality of Emergency Access Transfer Function, EATF, network devices, each comprising: a respective processor; the I-CSCF network device (400, 226) is configured to: query the computer-readable memory using an address of the user equipment to determine whether the address of the user equipment is stored in the computer-readable memory; obtain respective addresses of at least some EATF network devices of the plurality of EATF network devices in response to the initiated session transfer; transmit respective handover queries to the at least some EATF network devices using the determined respective addresses in response to the address of the user equipment not being stored in the computer-readable memory; and query the computer-readable memory using an address of the user equipment to determine whether the address of the user equipment is stored in the computer-readable memory; obtain respective addresses of at least some EATF network devices of the plurality of EATF network devices in response to the initiated session transfer; transmit respective handover queries to the at least some EATF network devices using the determined respective addresses in response to the address of the user equipment not being stored in the computer-readable memory; and the plurality of EATF network devices further configured to in response to a first handover query of the respective handover queries, provide an indication of whether the emergency communication session is being proxied by at least one of the one or more processors of the respective EATF network device.