mail.goldvision.com has no NS records.
NS records for this zone are defined at goldvision.com.
NS records for this zone are defined at goldvision.com.
Question and response
Question
dig mail.goldvision.com. NS
Answer
The response has no answer records.
Authority
goldvision.com. 3600 SOA ns1.goldvision.com. support.goldvision.com. 1998103041 10800 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0