Question and response
Question
dig _spf.kb4.io. PTR
Answer
The response has no answer records.
Authority
kb4.io. 900 SOA ns-2035.awsdns-62.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0