mx2.svitonline.com has no NS records.
NS records for this zone are defined at svitonline.com.
NS records for this zone are defined at svitonline.com.
Question and response
Question
dig mx2.svitonline.com. NS
Answer
The response has no answer records.
Authority
svitonline.com. 3600 SOA ns.sovamua.com. domaintech.kiev.sovam.com. 2020011800 14400 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0