0.168.192.in-addr.arpa.	IN	SOA	linux. root (
			2000231101
			10800
			3600
			432000
			38400 )
0.168.192.in-addr.arpa.	IN	NS	linux.
1.0.168.192.in-addr.arpa.	IN	PTR	router.intracentre.
2.0.168.192.in-addr.arpa.	IN	PTR	linux.intracentre.
100.0.168.192.in-addr.arpa.	IN	PTR	estacio100.intracentre.
101.0.168.192.in-addr.arpa.	IN	PTR	estacio101.intracentre.
102.0.168.192.in-addr.arpa.	IN	PTR	estacio102.intracentre.