kosbill.com.		30 IN SOA ns3.hostcenter.co.kr. root.kosbill.com. (
				2015111712 ; serial
				21600      ; refresh (6 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

kosbill.com.		30 IN TXT "v=spf1 ip4:112.217.112.171 ~all"

kosbill.com.		30 IN A	112.217.112.170

Mail exchangers:
kosbill.com.		30 IN MX 10 mail.kosbill.com.

Name servers:
kosbill.com.		30 IN NS ns3.hostcenter.co.kr.
kosbill.com.		30 IN NS ns4.hostcenter.co.kr.