gw3.sp.mktaut.com has no NS records.
NS records for this zone are defined at mktaut.com.
NS records for this zone are defined at mktaut.com.
Question and response
Question
dig gw3.sp.mktaut.com. NS
Answer
The response has no answer records.
Authority
mktaut.com. 300 SOA ns-cloud-a1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0