hou2906597.sarenet.com has no CNAME records.
Question and response
Question
dig hou2906597.sarenet.com. NS
Answer
The response has no answer records.
Authority
sarenet.com. 300 SOA ns1.sarenet.es. dnsmaster.sarenet.es. 2026030907 86400 7200 2592000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0