xeltek.co.kr.		30 IN SOA ns1.sdsns.com. firechoi.sds.co.kr. (
				2024092710 ; serial
				1800       ; refresh (30 minutes)
				300        ; retry (5 minutes)
				604800     ; expire (1 week)
				1800       ; minimum (30 minutes)
				)

xeltek.co.kr.		30 IN A	223.130.102.28

Name servers:
xeltek.co.kr.		30 IN NS ns1.sdsns.com.
xeltek.co.kr.		30 IN NS ns2.sdsns.com.