mailer1.mcfr.ru has no NS records.
NS records for this zone are defined at mcfr.ru.
NS records for this zone are defined at mcfr.ru.
Question and response
Question
dig mailer1.mcfr.ru. NS
Answer
The response has no answer records.
Authority
mcfr.ru. 300 SOA ns1.fr.ru. internet.action-media.ru. 2011103097 14400 3600 2592000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0