aisystems.co.kr.	30 IN SOA ns.gabia.co.kr. hosting.gabia.com. (
				2021042216 ; serial
				1800       ; refresh (30 minutes)
				600        ; retry (10 minutes)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

aisystems.co.kr.	30 IN TXT "v=spf1 include:spf.kakaowork.com ~all"

aisystems.co.kr.	30 IN A	211.47.75.61

Mail exchangers:
aisystems.co.kr.	30 IN MX 10 ps-aspmx1.kakaowork.com.
aisystems.co.kr.	30 IN MX 20 ps-aspmx2.kakaowork.com.

Name servers:
aisystems.co.kr.	30 IN NS ns.gabia.co.kr.
aisystems.co.kr.	30 IN NS ns1.gabia.co.kr.
aisystems.co.kr.	30 IN NS ns.gabia.net.