refer.ru.		30 IN SOA ns2.sema.ru. noc.sema.ru. (
				2020071901 ; serial
				86400      ; refresh (1 day)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				3600       ; minimum (1 hour)
				)

refer.ru.		30 IN A	46.4.75.61

Mail exchangers:
refer.ru.		30 IN MX 10 mx0.refer.ru.

Name servers:
refer.ru.		30 IN NS ns2.sema.ru.
refer.ru.		30 IN NS ns0.sema.ru.