8. A device, comprising: a memory storing executable instructions; and a processor coupled to the memory, wherein the executable instructions facilitate performance of operations comprising: receiving a query from a terminating call session control function server, wherein the query comprises a fully qualified domain name associated with a calling device, and wherein the query is received responsive to the terminating call session control function receiving a request from an originating call session control function server for a call session for the calling device and a terminating device over a communication network; and transmitting an answer to the terminating call session control function server responsive to the query, wherein the answer comprises one of an internet protocol version 4 address with a first error indicator, an internet protocol version 6 address with a second error indicator, or a combination thereof, wherein the answer is analyzed by the terminating call session control function server to determine an answer combination according to a combination of the first error indicator and the second error indicator, and wherein a response is transmitted by the terminating call session control function server to the calling device via one of the internet protocol version 4 address or the internet protocol version 6 address according to the answer combination that is determined.
11. The device of claim 8 , wherein the terminating call session control function server transmits the response via the internet protocol version 4 address if the answer combination comprises the internet protocol version 4 address with a first error indicator and the internet protocol version 6 address with a first non-error indicator.