mail.vrcodingdna.com has no NS records.
NS records for this zone are defined at vrcodingdna.com.
NS records for this zone are defined at vrcodingdna.com.
Question and response
Question
dig mail.vrcodingdna.com. NS
Answer
The response has no answer records.
Authority
vrcodingdna.com. 10800 SOA ns.vrcodingdna.com. cdna-nok.rotzefull.de. 1760000973 10800 3600 604800 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0