$ORIGIN .
$TTL 172800	; 2 days
0.168.192.in-addr.arpa	IN SOA	freiburg.lan. hostmaster.freiburg.lan. (
				20211583   ; serial
				86400      ; refresh (1 day)
				7200       ; retry (2 hours)
				604800     ; expire (1 week)
				172800     ; minimum (2 days)
				)
			NS	freiburg.lan.
$ORIGIN 0.168.192.in-addr.arpa.
1			PTR	freiburg.lan.
100			PTR	cluster.lan.
101			PTR	cluster-node1.lan.
102			PTR	cluster-node2.lan.
103			PTR	cluster-node3.lan.
110			PTR	cluster2.lan.
111			PTR	cluster2-node1.lan.
112			PTR	cluster2-node2.lan.
113			PTR	cluster2-node3.lan.
12			PTR	lab.lan.
13			PTR	tv-panasonic-sz.lan.
2			PTR	wz.lan.
252			PTR	wlan-pl-ap-sz.lan.
3			PTR	probook-wlan.lan.
$TTL 3600	; 1 hour
50			PTR	ubuntu-server-2004.lan.
52			PTR	Nexus-6.lan.
$TTL 172800	; 2 days
8			PTR	printer-hpcplj1525n.lan.