smtp2.email.uk-london-1.ocs.oraclecloud.com has no NS records.
NS records for this zone are defined at uk-london-1.ocs.oraclecloud.com.
NS records for this zone are defined at uk-london-1.ocs.oraclecloud.com.
Question and response
Question
dig smtp2.email.uk-london-1.ocs.oraclecloud.com. NS
Answer
The response has no answer records.
Authority
uk-london-1.ocs.oraclecloud.com. 300 SOA ns1.p68.dns.oraclecloud.net. hostmaster.uk-london-1.ocs.oraclecloud.com. 69677 3600 600 604800 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0