optimalvariant.ru.	30 IN SOA ns1.ihc.ru. info.ihc.ru. (
				2021072701 ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

optimalvariant.ru.	30 IN A	37.143.9.77

Mail exchangers:
optimalvariant.ru.	30 IN MX 10 mail.optimalvariant.ru.

Name servers:
optimalvariant.ru.	30 IN NS ns1.ihc.ru.
optimalvariant.ru.	30 IN NS ns2.ihc.ru.