mtaproxy4.free.mail.vip.gq1.yahoo.com has no NS records.
NS records for this zone are defined at gq1.yahoo.com.
NS records for this zone are defined at gq1.yahoo.com.
Question and response
Question
dig mtaproxy4.free.mail.vip.gq1.yahoo.com. NS
Answer
The response has no answer records.
Authority
gq1.yahoo.com. 600 SOA hidden-master.yahoo.com. hostmaster.yahoo-inc.com. 2026031903 3600 900 604800 600
Additional
. 0 OPT ; payload 1272, xrcode 0, version 0, flags 0