relay.rostel.ru has no NS records.
NS records for this zone are defined at rostel.ru.
NS records for this zone are defined at rostel.ru.
Question and response
Question
dig relay.rostel.ru. NS
Answer
The response has no answer records.
Authority
rostel.ru. 3600 SOA ns0.donpac.ru. noc.rostel.ru. 2025081100 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0