pinvmail.visa.com has no NS records.
NS records for this zone are defined at visa.com.
NS records for this zone are defined at visa.com.
Question and response
Question
dig pinvmail.visa.com. NS
Answer
The response has no answer records.
Authority
visa.com. 1800 SOA lloyd.ns.cloudflare.com. dns.cloudflare.com. 2397743076 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0