Question and response
Question
dig spf4.chargify.com. TXT
Answer
spf4.chargify.com. 300 TXT "v=spf1 ip4:198.2.177.0/24 ip4:198.2.178.0/23 ip4:198.2.180.0/24 ip6:2001:4860:4000::/36 ip6:2404:6800:4000::/36 ip6:2607:f8b0:4000::/36 ip6:2800:3f0:4000::/36 ip6:2a00:1450:4000::/36 ip6:2c0f:fb50:4000::/36 ip4:54.174.59.0/24 ip4:54.174.60.0/23 ~all"
Authority
chargify.com. 172800 NS ns-11.awsdns-01.com.
chargify.com. 172800 NS ns-1231.awsdns-25.org.
chargify.com. 172800 NS ns-1841.awsdns-38.co.uk.
chargify.com. 172800 NS ns-974.awsdns-57.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0