do.wnd.sh has no NS records.
NS records for this zone are defined at wnd.sh.
NS records for this zone are defined at wnd.sh.
Question and response
Question
dig do.wnd.sh. NS
Answer
The response has no answer records.
Authority
wnd.sh. 900 SOA ns1.wnd.sh. dns.sys.wnd.sh. 716 900 300 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0