ibtech.kr.		30 IN SOA ns.ibtech.kr. hjkim.ibtech.kr. (
				42         ; serial
				10800      ; refresh (3 hours)
				900        ; retry (15 minutes)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

ibtech.kr.		30 IN TXT "v=spf1 ip4:222.239.250.65 -all"

ibtech.kr.		30 IN A	183.111.125.11

Mail exchangers:
ibtech.kr.		30 IN MX 10 mail.ibtech.kr.

Name servers:
ibtech.kr.		30 IN NS ns.ibtech.kr.