obs1.backup.gts.ro has no CNAME records.
Question and response
Question
dig obs1.backup.gts.ro. NS
Answer
The response has no answer records.
Authority
gts.ro. 268 SOA ns.gtstelecom.ro. hostmaster.gtstelecom.ro. 2026020502 1800 7200 1814400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0