smtp-us.cloudzy.com has no NS records.
NS records for this zone are defined at cloudzy.com.
NS records for this zone are defined at cloudzy.com.
Question and response
Question
dig smtp-us.cloudzy.com. NS
Answer
The response has no answer records.
Authority
cloudzy.com. 1800 SOA nash.ns.cloudflare.com. dns.cloudflare.com. 2397339368 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0