17.48.0 IN PTR norbert.ams.openstreetmap.org.
49.48.0 IN PTR snap-01.ams.openstreetmap.org.
50.48.0 IN PTR karm.ams.openstreetmap.org.
100.48.0 IN PTR pdu1.ams.openstreetmap.org.
101.48.0 IN PTR pdu2.ams.openstreetmap.org.
102.48.0 IN PTR oob1.ams.openstreetmap.org.
17.48.0 IN PTR norbert.ams.openstreetmap.org.
49.48.0 IN PTR snap-01.ams.openstreetmap.org.
50.48.0 IN PTR karm.ams.openstreetmap.org.
100.48.0 IN PTR pdu1.ams.openstreetmap.org.
101.48.0 IN PTR pdu2.ams.openstreetmap.org.
102.48.0 IN PTR oob1.ams.openstreetmap.org.