gcasrv.EXPLORA.COM.SV has no CNAME records.
Question and response
Question
dig gcasrv.EXPLORA.COM.SV. NS
Answer
The response has no answer records.
Authority
explora.com.sv. 3776 SOA gcasrv.explora.com.sv. bjaime\@explora.com.sv. 2026021100 10801 3600 1209600 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0