best.			30 IN SOA ns0.centralnic.net. hostmaster.centralnic.net. (
				1527228161 ; serial
				900        ; refresh (15 minutes)
				1800       ; retry (30 minutes)
				6048000    ; expire (10 weeks)
				3600       ; minimum (1 hour)
				)

Name servers:
best.			30 IN NS a.nic.best.
best.			30 IN NS b.nic.best.
best.			30 IN NS c.nic.best.
best.			30 IN NS d.nic.best.