mailer.faitid.org has no NS records.
NS records for this zone are defined at faitid.org.
NS records for this zone are defined at faitid.org.
Question and response
Question
dig mailer.faitid.org. NS
Answer
The response has no answer records.
Authority
faitid.org. 600 SOA ns3-geo.nic.ru. dns-team.flexireg.net. 65014269 1440 3600 2592000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0