servidor2.svderp.com has no CNAME records.
Question and response
Question
dig servidor2.svderp.com. NS
Answer
The response has no answer records.
Authority
svderp.com. 1800 SOA amanda.ns.cloudflare.com. dns.cloudflare.com. 2397805454 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0