ns01.idcfcloud.com has no NS records.
NS records for this zone are defined at idcfcloud.com.
NS records for this zone are defined at idcfcloud.com.
Question and response
Question
dig ns01.idcfcloud.com. NS
Answer
The response has no answer records.
Authority
idcfcloud.com. 600 SOA ns01.idc.jp. dns-support.idc.jp. 2019060668 10800 1800 3600000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0