mtaproxy1.att.mail.vip.ne1.yahoo.com has no NS records.
NS records for this zone are defined at ne1.yahoo.com.
NS records for this zone are defined at ne1.yahoo.com.
Question and response
Question
dig mtaproxy1.att.mail.vip.ne1.yahoo.com. NS
Answer
The response has no answer records.
Authority
ne1.yahoo.com. 600 SOA hidden-master.yahoo.com. hostmaster.yahoo-inc.com. 2026031401 3600 900 604800 600
Additional
. 0 OPT ; payload 1272, xrcode 0, version 0, flags 0