spf.myappro.com has no NS records.
NS records for this zone are defined at myappro.com.
NS records for this zone are defined at myappro.com.
Question and response
Question
dig spf.myappro.com. NS
Answer
The response has no answer records.
Authority
myappro.com. 3600 SOA ns1-05.azure-dns.com. dnsmgmt.meridianlink.com. 2017071418 3600 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0