mx2.netflowservices.com has no NS records.
NS records for this zone are defined at netflowservices.com.
NS records for this zone are defined at netflowservices.com.
Question and response
Question
dig mx2.netflowservices.com. NS
Answer
The response has no answer records.
Authority
netflowservices.com. 300 SOA x.ns.joker.com. hostmaster.joker.com. 2024092653 14400 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0