troy.centos-server.net has no AAAA records.
Question and response
Question
dig troy.centos-server.net. AAAA
Answer
The response has no answer records.
Authority
troy.centos-server.net. 86369 SOA troy-dns1.centos-server.net. monitor.ace-host.net. 2019110700 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0