smtp71.mediacombb.net has no NS records.
NS records for this zone are defined at mediacombb.net.
NS records for this zone are defined at mediacombb.net.
Question and response
Question
dig smtp71.mediacombb.net. NS
Answer
The response has no answer records.
Authority
mediacombb.net. 300 SOA pdns104.ultradns.com. internetsupport.mediacomcc.com. 2021063191 10800 3600 604800 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0