Robtex

Up: 194.61.58.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 194.61.59.0/25
Down right: 194.61.59.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
194.61.59.20	A+PTR	vms10.voipplanet.nl
194.61.59.25	A+PTR	ns1.voipplanet.nl
194.61.59.25	A	ns1.maezenet.com
194.61.59.30	A+PTR	ns2.voipplanet.nl
194.61.59.40	A+PTR	tftp.voipplanet.nl
194.61.59.43	A+PTR	nas01.voipplanet.nl
194.61.59.46	PTR	smtp.voipplanet.nl
194.61.59.46	A	mail.vijfvinkel.net
194.61.59.46	A	mail.lignup.nl
194.61.59.50	A+PTR	ns2.colbox.nl
194.61.59.55	PTR	ns2.postnl.nl
194.61.59.56	PTR	www.voipplanet.nl
194.61.59.67	A+PTR	hv002.colbox.nl
194.61.59.67	A	mail.maezenet.com
194.61.59.67	A	mail.tinapay.net
194.61.59.70	PTR	hv002.colbox.nl
194.61.59.70	A	nettopic.nl
194.61.59.70	A	tinapay.net
194.61.59.75	PTR	hv002.colbox.nl
194.61.59.75	A	voipplanet.nl
194.61.59.75	A	cloudvpabx.com
194.61.59.130	A+PTR	sip2.voipplanet.nl
194.61.59.135	A+PTR	sip16.voipplanet.nl
194.61.59.144	A	sip4.voipplanet.nl
194.61.59.150	A+PTR	sip3.voipplanet.nl
194.61.59.185	A	an4717.voipplanet.nl
194.61.59.200	A	voip-pbx.e-dentify.nl
194.61.59.200	A	an4755.voipplanet.nl
194.61.59.213	PTR	an4725.voipplanet.nl
194.61.59.215	A+PTR	an4705.voipplanet.nl
194.61.59.223	PTR	an4713.voipplanet.nl
194.61.59.227	PTR	an4717.voipplanet.nl
194.61.59.231	A+PTR	an4760.voipplanet.nl
194.61.59.236	A+PTR	an4731.voipplanet.nl
194.61.59.239	PTR	an4734.voipplanet.nl
194.61.59.242	PTR	an4737.voipplanet.nl
194.61.59.243	PTR	an4738.voipplanet.nl
194.61.59.246	A+PTR	an4741.voipplanet.nl
194.61.59.247	A+PTR	an4742.voipplanet.nl
194.61.59.248	A+PTR	an4743.voipplanet.nl
194.61.59.249	A+PTR	an4744.voipplanet.nl
194.61.59.251	A+PTR	an4759.voipplanet.nl