isf.education.		30 IN SOA ns.mainnameserver.com. hostmaster.mainnameserver.com. (
				2019110171 ; serial
				10800      ; refresh (3 hours)
				600        ; retry (10 minutes)
				2419200    ; expire (4 weeks)
				3600       ; minimum (1 hour)
				)

isf.education.		30 IN A	192.124.249.55

Mail exchangers:
isf.education.		30 IN MX 10 mx.stackmail.com.

Name servers:
isf.education.		30 IN NS ns2.mainnameserver.com.
isf.education.		30 IN NS ns.mainnameserver.com.