c4948-1.tvstd.led.gblnet.net has no CNAME records.
Question and response
Question
dig c4948-1.tvstd.led.gblnet.net. NS
Answer
The response has no answer records.
Authority
led.gblnet.net. 10800 SOA ns.gblnet.ru. vvv.gblnet.ru. 2026030804 604800 86400 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0