anchor.diff:  50.49.0		IN	PTR	karm.oob.openstreetmap.org.
   52.49.0		IN	PTR	thorn-02.oob.openstreetmap.org.
   53.49.0		IN	PTR	thorn-03.oob.openstreetmap.org.
  +
  +2.64.0		IN	PTR	fafnir.dub.openstreetmap.org.
  +3.64.0		IN	PTR	spike-01.dub.openstreetmap.org.
  +4.64.0		IN	PTR	spike-02.dub.openstreetmap.org.
  +5.64.0		IN	PTR	spike-03.dub.openstreetmap.org.
  +6.64.0		IN	PTR	idris.dub.openstreetmap.org.
  +7.64.0		IN	PTR	konqi.dub.openstreetmap.org.
  +8.64.0		IN	PTR	naga.dub.openstreetmap.org.
  +9.64.0		IN	PTR	culebre.dub.openstreetmap.org.
  +50.64.0		IN	PTR	snap-03.dub.openstreetmap.org.
  +100.64.0	IN	PTR	pdu1.dub.openstreetmap.org.
  +101.64.0	IN	PTR	pdu2.dub.openstreetmap.org.
  +102.64.0	IN	PTR	oob.dub.openstreetmap.org.
  +
  +2.65.0		IN	PTR	fafnir.oob.openstreetmap.org.
  +3.65.0		IN	PTR	spike-01.oob.openstreetmap.org.
  +4.65.0		IN	PTR	spike-02.oob.openstreetmap.org.
  +5.65.0		IN	PTR	spike-03.oob.openstreetmap.org.
  +6.65.0		IN	PTR	idris.oob.openstreetmap.org.
  +7.65.0		IN	PTR	konqi.oob.openstreetmap.org.
  +8.65.0		IN	PTR	naga.oob.openstreetmap.org.
  +9.65.0		IN	PTR	culebre.oob.openstreetmap.org.
  +50.65.0		IN	PTR	snap-03.oob.openstreetmap.org.
  
positive.code: 
  $TTL	604800
  @	IN	SOA	<%= node[:fdqn] %>. root.openstreetmap.org. (
                       2019040301		; Serial
                           604800		; Refresh
                            86400		; Retry
                          2419200		; Expire
  
negative.code: 50.48.0		IN	PTR	karm.ams.openstreetmap.org.
  52.48.0		IN	PTR	thorn-02.ams.openstreetmap.org.
  53.48.0		IN	PTR	thorn-03.ams.openstreetmap.org.
  100.48.0	IN	PTR	pdu1.ams.openstreetmap.org.
  101.48.0	IN	PTR	pdu2.ams.openstreetmap.org.
  
  3.49.0		IN	PTR	orm.oob.openstreetmap.org.
  4.49.0		IN	PTR	ouroboros.oob.openstreetmap.org.
  