billing.stud5.led.gblnet.net has no CNAME records.
Question and response
Question
dig billing.stud5.led.gblnet.net. NS
Answer
The response has no answer records.
Authority
led.gblnet.net. 9781 SOA ns.gblnet.ru. vvv.gblnet.ru. 2026022701 604800 86400 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0