sec1.encirca.com has no CNAME records.
Question and response
Question
dig sec1.encirca.com. NS
Answer
The response has no answer records.
Authority
encirca.com. 600 SOA dnssec1.encirca.net. dnsmaster.encirca.com. 2026021901 43200 600 1209600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0