Question and response
Question
dig ns.yc.hn. NS
Answer
ns.yc.hn. 5 CNAME node-stack.yc.hn.
Authority
yc.hn. 838 SOA ns.yc.hn. webmaster.yc.hn. 1769539642 3600 600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0