mx1.beltelecom.by has no NS records.
NS records for this zone are defined at beltelecom.by.
NS records for this zone are defined at beltelecom.by.
Question and response
Question
dig mx1.beltelecom.by. NS
Answer
The response has no answer records.
Authority
beltelecom.by. 3600 SOA nsrv.belpak.by. dns-admin.belpak.by. 2026021201 43200 7200 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0