abi148ahj0.sin1.oracleemaildelivery.com has no NS records.
NS records for this zone are defined at sin1.oracleemaildelivery.com.
NS records for this zone are defined at sin1.oracleemaildelivery.com.
Question and response
Question
dig abi148ahj0.sin1.oracleemaildelivery.com. NS
Answer
The response has no answer records.
Authority
sin1.oracleemaildelivery.com. 300 SOA ns1.p68.dns.oraclecloud.net. hostmaster.sin1.oracleemaildelivery.com. 725714 3600 600 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0