ns2.responsys.net has no NS records.
NS records for this zone are defined at responsys.net.
NS records for this zone are defined at responsys.net.
Question and response
Question
dig ns2.responsys.net. NS
Answer
The response has no answer records.
Authority
responsys.net. 1800 SOA a1-16.akam.net. hostmaster.oracle.com. 2025052704 10800 1800 604800 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0