world.kr.		30 IN SOA ns.world.kr. root.world.kr. (
				2013041200 ; serial
				86400      ; refresh (1 day)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

world.kr.		30 IN A	183.111.166.18

Mail exchangers:
world.kr.		30 IN MX 10 world.kr.

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