mx02.obenetwork.com has no NS records.
NS records for this zone are defined at obenetwork.com.
NS records for this zone are defined at obenetwork.com.
Question and response
Question
dig mx02.obenetwork.com. NS
Answer
The response has no answer records.
Authority
obenetwork.com. 7200 SOA ns01.obenetwork.com. hostmaster.obenetwork.com. 2025082000 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0