pro.br.			30 IN SOA a.dns.br. hostmaster.registro.br. (
				2024322294 ; serial
				1800       ; refresh (30 minutes)
				900        ; retry (15 minutes)
				604800     ; expire (1 week)
				900        ; minimum (15 minutes)
				)

Name servers:
pro.br.			30 IN NS a.dns.br.
pro.br.			30 IN NS b.dns.br.
pro.br.			30 IN NS c.dns.br.
pro.br.			30 IN NS d.dns.br.
pro.br.			30 IN NS e.dns.br.
pro.br.			30 IN NS f.dns.br.