app.br.                 	86400	IN  	NS	a.dns.br.
app.br.                 	86400	IN  	NS	b.dns.br.
app.br.                 	86400	IN  	NS	c.dns.br.
app.br.                 	86400	IN  	NS	d.dns.br.
app.br.                 	86400	IN  	NS	e.dns.br.
app.br.                 	86400	IN  	NS	f.dns.br.

app.br.                 	86400	IN  	SOA	a.dns.br. hostmaster.registro.br. 2025312346 1800 900 604800 900