$TTL 300
@		IN	SOA  mname1. . (
			1       ; serial
			20      ; refresh (20 seconds)
			20      ; retry (20 seconds)
			1814400 ; expire (3 weeks)
			3600    ; minimum (1 hour)
			)

			NS	ns3
ns3			A	10.53.0.3

a			A	10.0.0.1
b			A	10.0.0.2
c			A	10.0.0.3