spfa.contegix.com has no NS records.
NS records for this zone are defined at contegix.com.
NS records for this zone are defined at contegix.com.
Question and response
Question
dig spfa.contegix.com. NS
Answer
The response has no answer records.
Authority
contegix.com. 900 SOA ns-1247.awsdns-27.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0