mail2.fundamentum.com.ua has no NS records.
NS records for this zone are defined at fundamentum.com.ua.
NS records for this zone are defined at fundamentum.com.ua.
Question and response
Question
dig mail2.fundamentum.com.ua. NS
Answer
The response has no answer records.
Authority
fundamentum.com.ua. 3600 SOA nsa3.srv53.net. support.dnshosting.org. 1771921326 1800 600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0