ns2.miningequipments.net has no AAAA records.
Question and response
Question
dig ns2.miningequipments.net. AAAA
Answer
ns2.miningequipments.net. 5 CNAME miningequipments.net.
Authority
miningequipments.net. 321 SOA ns-1799.awsdns-32.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0