Robtex

Up: 212.66.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 212.66.64.0/22
Down right: 212.66.68.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.66.64.0	PTR	mob.212-66-64-0.dyn.cust.tango.lu
212.66.65.80	PTR	mob.212-66-65-80.dyn.cust.tango.lu
212.66.66.11	PTR	mob.212-66-66-11.dyn.cust.tango.lu
212.66.66.11	A	speedtest.tango.lu
212.66.67.25	A+PTR	smtp.wallenborn.com
212.66.68.0	PTR	adsl.212-66-68-0.fix.cust.tango.lu
212.66.68.2	PTR	adsl.212-66-68-2.fix.cust.tango.lu
212.66.68.18	PTR	adsl.212-66-68-18.fix.cust.tango.lu
212.66.68.24	PTR	adsl.212-66-68-24.fix.cust.tango.lu
212.66.68.34	PTR	adsl.212-66-68-34.fix.cust.tango.lu
212.66.68.37	PTR	adsl.212-66-68-37.fix.cust.tango.lu
212.66.68.117	PTR	adsl.212-66-68-117.fix.cust.tango.lu
212.66.68.117	A	test.maret.lu
212.66.68.153	PTR	adsl.212-66-68-153.fix.cust.tango.lu
212.66.68.153	A	freelenstv.com
212.66.68.169	A+PTR	utm.luxaqua.lu
212.66.68.179	PTR	adsl.212-66-68-179.fix.cust.tango.lu
212.66.68.179	A	spamtitan.atconsulting.lu
212.66.68.179	A	mail.atconsulting.lu
212.66.68.181	PTR	adsl.212-66-68-181.fix.cust.tango.lu
212.66.68.189	PTR	adsl.212-66-68-189.fix.cust.tango.lu
212.66.68.189	A	mail.arphan.com
212.66.68.189	A	intra.demaret.lu
212.66.68.196	PTR	adsl.212-66-68-196.fix.cust.tango.lu
212.66.68.196	A	mx.asa.lu
212.66.68.213	PTR	adsl.212-66-68-213.fix.cust.tango.lu
212.66.68.213	A	exchange.colwind.com
212.66.68.213	A	exchange.poleol.com
212.66.68.215	PTR	adsl.212-66-68-215.fix.cust.tango.lu
212.66.68.217	PTR	adsl.212-66-68-217.fix.cust.tango.lu
212.66.68.217	A	prestaedit.com
212.66.68.217	A	creationsartisanales.be
212.66.68.218	PTR	adsl.212-66-68-218.fix.cust.tango.lu
212.66.68.218	A	mail.brgaming.com
212.66.68.218	A	nex-lot.com
212.66.68.240	A+PTR	mx1.stugalux.lu
212.66.68.243	PTR	adsl.212-66-68-243.fix.cust.tango.lu
212.66.68.243	A	mail.ibo.lu
212.66.68.248	PTR	adsl.212-66-68-248.fix.cust.tango.lu
212.66.68.251	A	mx.netregie.lu
212.66.69.43	PTR	212-66-69-43.core.tango.lu
212.66.69.106	PTR	212-66-69-106.core.tango.lu
212.66.70.1	PTR	212-66-70-1.core.tango.lu
212.66.70.1	A	ns1.everyday.lu
212.66.70.2	A	ns2.everyday.lu
212.66.70.3	A+PTR	ns3.tango.lu
212.66.70.5	A	ns5.tango.lu
212.66.70.67	PTR	212-66-70-67.core.tango.lu
212.66.71.6	A	epdg.epc.mnc077.mcc270.pub.3gppnetwork.org
212.66.71.11	PTR	212-66-71-11.core.tango.lu
212.66.71.12	PTR	212-66-71-12.core.tango.lu
212.66.71.15	A	epdg.epc.mnc077.mcc270.pub.3gppnetwork.org
212.66.71.138	PTR	212-66-71-138.core.tango.lu