spf0.businessolver.com has no NS records.
NS records for this zone are defined at businessolver.com.
NS records for this zone are defined at businessolver.com.
Question and response
Question
dig spf0.businessolver.com. NS
Answer
The response has no answer records.
Authority
businessolver.com. 900 SOA ns-217.awsdns-27.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0