mail.SYLERONT.RU has no NS records.
NS records for this zone are defined at SYLERONT.RU.
NS records for this zone are defined at SYLERONT.RU.
Question and response
Question
dig mail.SYLERONT.RU. NS
Answer
The response has no answer records.
Authority
SYLERONT.RU. 3600 SOA firstvds.RU. guttaviva.gmail.com. 2023051300 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0