ip6.mx.mostelekom.net has no NS records.
NS records for this zone are defined at net.
NS records for this zone are defined at net.
Question and response
Question
dig ip6.mx.mostelekom.net. NS
Answer
The response has no answer records.
Authority
mostelekom.net. 3758 SOA ns1.ncnet.ru. noc.ncnet.ru. 2019081901 10800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0