Robtex

Up: 181.88.0.0/14
Can't show all results, try to descend to a more specific CIDR
Down left: 181.88.0.0/16
Down right: 181.89.0.0/16
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
181.88.0.67	PTR	host67.181-88-0.telecom.net.ar
181.88.0.70	PTR	host70.181-88-0.telecom.net.ar
181.88.0.76	PTR	host76.181-88-0.telecom.net.ar
181.88.16.2	PTR	host2.181-88-16.telecom.net.ar
181.88.17.2	PTR	host2.181-88-17.telecom.net.ar
181.88.30.2	PTR	host2.181-88-30.telecom.net.ar
181.88.32.188	PTR	host188.181-88-32.telecom.net.ar
181.88.36.1	PTR	host1.181-88-36.telecom.net.ar
181.88.36.2	PTR	host2.181-88-36.telecom.net.ar
181.88.48.79	PTR	host79.181-88-48.telecom.net.ar
181.88.57.68	A	cabinet-lautour.fr
181.88.68.142	PTR	host142.181-88-68.telecom.net.ar
181.88.81.0	PTR	host0.181-88-81.telecom.net.ar
181.88.81.1	PTR	host1.181-88-81.telecom.net.ar
181.88.86.156	PTR	host156.181-88-86.telecom.net.ar
181.88.86.164	PTR	host164.181-88-86.telecom.net.ar
181.88.86.180	PTR	host180.181-88-86.telecom.net.ar
181.88.108.224	PTR	host224.181-88-108.telecom.net.ar
181.88.109.49	PTR	host49.181-88-109.telecom.net.ar
181.88.113.81	PTR	host81.181-88-113.telecom.net.ar
181.88.123.0	PTR	host0.181-88-123.telecom.net.ar
181.88.123.3	PTR	host3.181-88-123.telecom.net.ar
181.88.152.0	PTR	host0.181-88-152.telecom.net.ar
181.88.152.2	PTR	host2.181-88-152.telecom.net.ar
181.88.152.3	PTR	host3.181-88-152.telecom.net.ar
181.88.176.45	PTR	host45.181-88-176.telecom.net.ar
181.88.176.65	PTR	host65.181-88-176.telecom.net.ar
181.88.177.131	A	mail1.periodicojudicial.gov.ar
181.88.177.132	A	mail2.periodicojudicial.gov.ar
181.88.177.154	A	srconlara.com.ar
181.88.178.11	PTR	host11.181-88-178.telecom.net.ar
181.88.178.56	PTR	host56.181-88-178.telecom.net.ar
181.88.178.133	PTR	host133.181-88-178.telecom.net.ar
181.88.178.182	A	nosury.com
181.88.178.244	A	syzneuuo.com
181.88.179.10	A	ip1.tharsis-it.com
181.88.179.10	A	tharsis-it.com
181.88.180.148	PTR	host148.181-88-180.telecom.net.ar
181.88.180.148	A	mx.stanet.com.ar
181.88.180.149	PTR	host149.181-88-180.telecom.net.ar
181.88.180.149	A	stanet.com.ar
181.88.180.150	PTR	host150.181-88-180.telecom.net.ar
181.88.180.150	A	dns1.stanet.com.ar
181.88.180.210	A	pyhnet.com.ar
181.88.182.2	A	mail.trabucohogar.com.ar
181.88.182.26	A	mail.iucbc.edu.ar
181.88.182.29	PTR	host29.181-88-182.telecom.net.ar
181.88.182.30	PTR	host30.181-88-182.telecom.net.ar
181.88.182.30	A	dns4.webmailhp.com.ar
181.88.182.30	A	dns12.hospitalprivadocordoba.com
181.88.184.4	PTR	host4.181-88-184.telecom.net.ar
181.88.184.4	A	ayacucho2.cotilloncasaalberto.com.ar
181.88.184.26	PTR	host26.181-88-184.telecom.net.ar
181.88.184.26	A	correo1.tevecompras.com
181.88.184.26	A	mail.tevecompras.com
181.88.184.27	PTR	host27.181-88-184.telecom.net.ar
181.88.184.27	A	ns3.tevecompras.com
181.88.188.0	PTR	host0.181-88-188.telecom.net.ar
181.88.188.1	PTR	host1.181-88-188.telecom.net.ar
181.88.188.5	A	dns2.catastrocordoba.gob.ar
181.88.188.5	A	dns2.cba.gov.ar
181.88.188.5	A	dns2.cba.gob.ar
181.88.188.7	A	sierras.cba.gov.ar
181.88.192.0	PTR	host0.181-88-192.telecom.net.ar
181.88.192.1	PTR	host1.181-88-192.telecom.net.ar
181.88.192.2	PTR	host2.181-88-192.telecom.net.ar
181.88.192.3	PTR	host3.181-88-192.telecom.net.ar
181.88.192.10	A	testvelocidad2.com
181.88.192.10	A	consejerotactico.com
181.88.192.10	A	vaalris.com
181.88.196.3	PTR	host3.181-88-196.telecom.net.ar
181.88.196.3	A	mordor.cimomet.com.ar
181.88.196.138	PTR	mail.cisb.com.ar
181.88.196.138	A	mail.multisolar.com.ar
181.88.196.138	A	spostales.com.ar
181.88.197.90	PTR	host90.181-88-197.telecom.net.ar
181.88.198.141	PTR	141.198.88.181.telecom.com.ar
181.88.205.133	PTR	host133.181-88-205.telecom.net.ar
181.88.207.119	PTR	host119.181-88-207.telecom.net.ar
181.88.208.1	PTR	host1.181-88-208.telecom.net.ar
181.88.210.124	PTR	host124.181-88-210.telecom.net.ar
181.88.211.189	PTR	host189.181-88-211.telecom.net.ar
181.88.215.76	PTR	host76.181-88-215.telecom.net.ar
181.88.215.76	A	distribuidoramundo.com
181.88.222.63	PTR	host63.181-88-222.telecom.net.ar
181.88.222.63	A	radioblogfm.sytes.net
181.88.222.63	A	montecaserosinter.com
181.88.223.178	PTR	host178.181-88-223.telecom.net.ar
181.88.224.40	PTR	host40.181-88-224.telecom.net.ar
181.88.224.216	PTR	host216.181-88-224.telecom.net.ar
181.88.225.0	PTR	host0.181-88-225.telecom.net.ar
181.88.225.0	A	fincalatortuga.com.ar
181.88.226.117	PTR	host117.181-88-226.telecom.net.ar
181.88.226.117	A	biblioprovincial.ddns.net
181.88.235.251	PTR	host251.181-88-235.telecom.net.ar
181.88.245.72	PTR	host72.181-88-245.telecom.net.ar
181.88.247.252	PTR	host252.181-88-247.telecom.net.ar
181.88.247.252	A	gestionalumnosterciarios.com
181.88.250.44	PTR	host44.181-88-250.telecom.net.ar
181.88.250.223	PTR	host223.181-88-250.telecom.net.ar
181.88.254.179	PTR	host179.181-88-254.telecom.net.ar
181.89.0.0	PTR	host0.181-89-0.telecom.net.ar
181.89.2.0	PTR	host0.181-89-2.telecom.net.ar
181.89.4.0	PTR	host0.181-89-4.telecom.net.ar