mx.LI-LU.ru has no NS records.
NS records for this zone are defined at LI-LU.ru.
NS records for this zone are defined at LI-LU.ru.
Question and response
Question
dig mx.LI-LU.ru. NS
Answer
The response has no answer records.
Authority
LI-LU.ru. 600 SOA ns3-l2.nic.ru. postmaster.li-lu.ru. 65012925 14400 3600 2592000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0