e210.en25.com has no NS records.
NS records for this zone are defined at en25.com.
NS records for this zone are defined at en25.com.
Question and response
Question
dig e210.en25.com. NS
Answer
The response has no answer records.
Authority
en25.com. 300 SOA ns1.p201.dns.oraclecloud.net. hostmaster.en25.com. 7863 3600 600 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0