mail.MASTERTELECOM.RU has no NS records.
NS records for this zone are defined at MASTERTELECOM.RU.
NS records for this zone are defined at MASTERTELECOM.RU.
Question and response
Question
dig mail.MASTERTELECOM.RU. NS
Answer
The response has no answer records.
Authority
MASTERTELECOM.RU. 3600 SOA ns1.mastertel.RU. noc.mastertel.RU. 2024122300 10800 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0