pmg.GRIFONHR.RU has no NS records.
NS records for this zone are defined at GRIFONHR.RU.
NS records for this zone are defined at GRIFONHR.RU.
Question and response
Question
dig pmg.GRIFONHR.RU. NS
Answer
The response has no answer records.
Authority
grifonhr.ru. 1440 SOA ns.ex-sis.ru. admin.grifonhr.ru. 130320255 10800 3600 604800 604800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0