mail.vnslns.com has no NS records.
NS records for this zone are defined at vnslns.com.
NS records for this zone are defined at vnslns.com.
Question and response
Question
dig mail.vnslns.com. NS
Answer
The response has no answer records.
Authority
vnslns.com. 3600 SOA pns31.cloudns.net. support.cloudns.net. 2026022503 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0