post04.jp.fancs.com has no CNAME records.
Question and response
Question
dig post04.jp.fancs.com. NS
Answer
The response has no answer records.
Authority
fancs.com. 267 SOA ns1.fancs.com. root.fancs.com. 2026022607 3600 600 6048000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0