mail.abitek.com.ua has no NS records.
NS records for this zone are defined at abitek.com.ua.
NS records for this zone are defined at abitek.com.ua.
Question and response
Question
dig mail.abitek.com.ua. NS
Answer
The response has no answer records.
Authority
abitek.com.ua. 1800 SOA nsa1.srv53.net. support.dnshosting.org. 1749439022 1800 600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0