Robtex

Up: 109.68.96.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 109.68.96.0/22
Down right: 109.68.100.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
109.68.96.4	PTR	infra-a-ext.nfon.net
109.68.96.5	PTR	customer-log.nfon.net
109.68.96.16	PTR	r-ic2-net.nfon.net
109.68.96.17	PTR	br-a1-vl201.nfon.net
109.68.96.18	PTR	br-a2-vl201.nfon.net
109.68.96.33	A+PTR	fw-a-ext.nfon.net
109.68.96.34	PTR	fw-a1-ext.nfon.net
109.68.96.42	PTR	br-a2-gi1-5.nfon.net
109.68.96.43	PTR	r-ic-a-bcast.nfon.net
109.68.96.66	A+PTR	portal-a-ext.nfon.net
109.68.96.72	PTR	sql03.muc01.de.nfon.net
109.68.96.81	PTR	zreg01-ext.nfon.net
109.68.96.98	PTR	iptego.nfon.net
109.68.96.99	PTR	dhcp-a-99.nfon.net
109.68.96.128	A+PTR	zreg.nfon.net
109.68.96.132	A+PTR	fax-cluster.nfon.net
109.68.96.132	A	fax.nfon.net
109.68.96.132	A	fax.kommunikations-dienste.de
109.68.96.176	A+PTR	cust-test.cr.nfon.net
109.68.96.189	A+PTR	stun.nfon.net
109.68.96.189	A+PTR	stun01.nfon.net
109.68.96.189	A	globaliptel.mystun.net
109.68.97.0	PTR	infra-b-net.nfon.net
109.68.97.4	A+PTR	infra-b-ext.nfon.net
109.68.97.4	PTR	ns2.nfon.net
109.68.97.6	PTR	fw-b-vl2404-trust.nfon.net
109.68.97.7	PTR	infra-b-bcast.nfon.net
109.68.97.12	PTR	v2304-b1.core.nfon.net
109.68.97.16	PTR	r-ic2-net.nfon.net
109.68.97.17	PTR	br-a1-vl202.nfon.net
109.68.97.33	A+PTR	fw-b-ext.nfon.net
109.68.97.34	PTR	fw-b1-ext.nfon.net
109.68.97.60	PTR	br-b1-vl2303.nfon.net
109.68.97.66	A+PTR	portal-b-ext.nfon.net
109.68.97.71	PTR	sql02.muc02.de.nfon.net
109.68.97.78	PTR	nsrp-gw-2401.nfon.net
109.68.97.90	PTR	cr02-ext.nfon.net
109.68.97.91	A+PTR	zreg-b-ext.nfon.net
109.68.97.120	A+PTR	srtpvip02.de.nfon.net
109.68.97.123	A+PTR	reg-muc02.cloud-cfg.com
109.68.97.131	A	nfon.prov.nfon.net
109.68.97.133	PTR	dl.nfon.net
109.68.97.133	A	dl.kommunikations-dienste.de
109.68.97.134	PTR	webservice.nfon.net
109.68.97.135	PTR	pilot.kommunikations-dienste.de
109.68.97.137	A	ncontrol.nfon.net
109.68.97.138	PTR	provisioning-pilot.nfon.net
109.68.97.139	A+PTR	provisioning.kommunikations-dienste.de
109.68.97.143	A+PTR	rkom.ncontrol.nfon.net
109.68.97.147	PTR	komro.ncontrol.nfon.net
109.68.97.148	PTR	komro.prov.nfon.net
109.68.97.158	A+PTR	clara.ncontrol.nfon.net
109.68.97.168	PTR	hfo.ncontrol.nfon.net
109.68.97.173	PTR	ucaas.ncontrol.nfon.net
109.68.97.183	A+PTR	planet33.ncontrol.nfon.net
109.68.97.188	PTR	interoute.ncontrol.nfon.net
109.68.97.190	PTR	sunrise.qm.nfon.net
109.68.97.191	PTR	sunrise.serviceportal.nfon.net
109.68.97.192	PTR	sunrise.prov.nfon.net
109.68.97.193	PTR	sunrise.ncontrol.nfon.net
109.68.97.203	A+PTR	temp-provisioning.kommunikations-dienste.de
109.68.97.203	PTR	provisioning.kommunikations-dienste.de
109.68.97.221	A+PTR	provservice.cloud-cfg.com
109.68.97.221	A+PTR	fmcpdb.nfon.net
109.68.97.224	A+PTR	provisioning.cloud-cfg.com
109.68.97.246	A+PTR	ccm.cloud-cfg.com
109.68.97.246	A+PTR	s1.qm.nfon.net
109.68.97.249	PTR	up.cloud-cfg.com
109.68.97.249	A	ncontrol.nfon.net
109.68.97.249	A	rkom.ncontrol.nfon.net
109.68.97.250	PTR	nfon.net
109.68.98.0	PTR	pbx-a-net.nfon.net
109.68.98.9	PTR	pbx09.muc01.de.nfon.net
109.68.98.29	PTR	pbx29.muc01.de.nfon.net
109.68.98.42	PTR	pbx-a-42.nfon.net
109.68.98.48	PTR	pbx-a-48.nfon.net
109.68.98.56	PTR	pbx-a-56.nfon.net
109.68.98.59	PTR	pbx-a-59.nfon.net
109.68.98.67	PTR	pbx-a-67.nfon.net
109.68.98.80	PTR	pbx-a-80.nfon.net
109.68.98.83	PTR	pbx-a-83.nfon.net
109.68.98.88	PTR	pbx-a-88.nfon.net
109.68.98.97	PTR	pbx-a-97.nfon.net
109.68.98.249	A+PTR	fax01-ext.nfon.net
109.68.99.0	PTR	pbx-b-net.nfon.net
109.68.99.1	PTR	pbx001.muc02.de.nfon.net
109.68.99.3	PTR	pbx-b-3.nfon.net
109.68.99.18	PTR	pbx18-ext.nfon.net
109.68.99.25	PTR	pbx-b-25.nfon.net
109.68.99.27	A+PTR	pbx005.muc02.de.nfon.net
109.68.99.35	PTR	pbx-b-35.nfon.net
109.68.99.39	A	pbx015.muc02.de.nfon.net
109.68.99.41	PTR	pbx-b-41.nfon.net
109.68.99.42	PTR	pbx-b-42.nfon.net
109.68.99.43	PTR	pbx-b-43.nfon.net
109.68.99.57	PTR	pbx-b-57.nfon.net
109.68.99.58	PTR	pbx-b-58.nfon.net
109.68.99.81	PTR	pbx-b-81.nfon.net
109.68.99.90	PTR	pbx-b-90.nfon.net
109.68.99.91	PTR	pbx-b-91.nfon.net
109.68.99.202	PTR	pbx-b-202.nfon.net
109.68.100.0	PTR	infra-a-net1.nfon.net
109.68.100.0	PTR	v1404-net.core.nfon.net
109.68.100.51	PTR	nhotel.muc01.de.nfon.net
109.68.100.56	A+PTR	smtpout01.muc01.de.nfon.net
109.68.100.58	PTR	git.muc01.de.nfon.net
109.68.100.59	PTR	web01.muc01.de.nfon.net
109.68.100.60	A	dns01.muc01.de.nfon.net
109.68.100.61	A	ns1.nue01.de.nfon.net
109.68.100.61	A	ns1.nfon.net
109.68.100.65	PTR	crowd.nfon.net
109.68.100.69	A	mq02.muc02.de.nfon.net
109.68.100.75	PTR	nagios.nfon.net
109.68.100.76	A+PTR	tftp-ext.nfon.net
109.68.100.78	A	noris-jumpgate-ext.nfon.net
109.68.100.79	A	openvpn.nfon.net
109.68.100.80	A	glassfish02.nfon.net
109.68.100.81	A+PTR	portal02.muc02.de.nfon.net
109.68.100.82	A+PTR	infra-www.nfon.net
109.68.100.83	PTR	monitor02.muc02.de.nfon.net
109.68.100.122	PTR	web02.muc02.de.nfon.net
109.68.100.125	A	ns2.nfon.net
109.68.100.129	PTR	ngn-portal.nfon.net
109.68.100.130	A+PTR	ngn-webservice.nfon.net
109.68.101.97	A	asc-cloud.net
109.68.103.103	PTR	tomcat-xmlproxy.idev.nfon.net
109.68.103.129	PTR	tdev01.tdev.nfon.net
109.68.103.136	PTR	fmc.idev.nfon.net
109.68.103.137	PTR	cr.tdev.nfon.net
109.68.103.255	A+PTR	v2407-bcast.core.nfon.net