Question and response
Question
dig spf.kakaowork.com. TXT
Answer
spf.kakaowork.com. 3600 TXT "v=spf1 ip4:210.109.46.44 ip4:210.109.46.45 ip4:210.109.46.41 ip4:210.109.46.42 ip4:210.109.46.48 ip4:210.109.46.49 ip4:210.109.52.226 ip4:61.109.237.150 ip4:61.109.238.240 ip4:210.109.14.101 ~all"
Authority
kakaowork.com. 3600 NS ns-1193.awsdns-21.org.
kakaowork.com. 3600 NS ns-1898.awsdns-45.co.uk.
kakaowork.com. 3600 NS ns-205.awsdns-25.com.
kakaowork.com. 3600 NS ns-545.awsdns-04.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0