Question and response
Question
dig _spf1.zendesk.com. TXT
Answer
_spf1.zendesk.com. 3600 TXT "v=spf1 ip4:185.12.80.0/22 ip4:185.58.84.93 ip4:188.172.128.0/20 ip4:192.161.144.0/20 ip4:198.37.152.186 ip4:20.52.128.133 ip4:20.52.52.2 ip6:2001:4860:4864::/56 ip4:205.139.110.0/24 ip4:207.211.30.128/25 include:_spf2.zendesk.com ~all"
Authority
zendesk.com. 172800 NS ns-1213.awsdns-23.org.
zendesk.com. 172800 NS ns-1858.awsdns-40.co.uk.
zendesk.com. 172800 NS ns-444.awsdns-55.com.
zendesk.com. 172800 NS ns-754.awsdns-30.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0