spf3.chargify.com has no NS records.
NS records for this zone are defined at chargify.com.
NS records for this zone are defined at chargify.com.
Question and response
Question
dig spf3.chargify.com. NS
Answer
The response has no answer records.
Authority
chargify.com. 900 SOA ns-1841.awsdns-38.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0