spf-01.bizmail.nifcloud.com has no NS records.
NS records for this zone are defined at nifcloud.com.
NS records for this zone are defined at nifcloud.com.
Question and response
Question
dig spf-01.bizmail.nifcloud.com. NS
Answer
The response has no answer records.
Authority
nifcloud.com. 3600 SOA ns0.dns.nifcloud.com. hostmaster.dns.nifcloud.com. 1695201732 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0