Robtex

Up: 200.123.138.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 200.123.138.0/25
Down right: 200.123.138.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.123.138.6	PTR	mae3-a.mae.com.ar
200.123.138.6	A	www.mae.com.ar
200.123.138.9	A+PTR	edge.mae.com.ar
200.123.138.19	PTR	customer-static-123-138-19.iplannetworks.net
200.123.138.19	A	esiopel.mae.com.ar
200.123.138.70	PTR	customer-static-123-138-70.iplannetworks.net
200.123.138.70	A	www.lasolidaria.com
200.123.138.97	A	solucionesbancarias.com.ar
200.123.138.114	PTR	mx01.boletinoficial.gob.ar
200.123.138.114	A+PTR	mx01.boletinoficial.gov.ar
200.123.138.130	PTR	customer-static-123-138-130.iplannetworks.net
200.123.138.130	A	secure.e-mmp.com.ar
200.123.138.131	PTR	mail-server.mmp.com.ar
200.123.138.131	A	www.ibope-emonitor.com
200.123.138.134	PTR	customer-static-123-138-134.iplannetworks.net
200.123.138.138	PTR	customer-static-123-138-138.iplannetworks.net
200.123.138.138	A	streaming.ibope.com.ar
200.123.138.139	PTR	customer-static-123-138-139.iplannetworks.net
200.123.138.139	A	www.kantaribopemedia.com.ar
200.123.138.139	A	kantaribopemedia.com.ar
200.123.138.140	A+PTR	smtp1.grupoibope.com.ar
200.123.138.165	PTR	mail.quintanacom.com.ar
200.123.138.165	A	iplan.fideisalud.com.ar
200.123.138.177	PTR	correo.ryaco.com
200.123.138.177	PTR	mail.ryaco.com
200.123.138.177	A+PTR	rya-srv007.ryaco.com
200.123.138.178	A+PTR	correo.ryaco.com
200.123.138.178	A+PTR	mail.ryaco.com
200.123.138.178	PTR	correo.ryaco.com.ar
200.123.138.180	PTR	customer-static-123-138-180.iplannetworks.net
200.123.138.180	A	mail.somos.com.ar
200.123.138.185	A+PTR	mail.ampf.org.ar
200.123.138.185	A	ns1.ampf.org.ar
200.123.138.185	A	ainscough.com.ar
200.123.138.210	PTR	customer-static-123-138-210.iplannetworks.net
200.123.138.210	A	mantis.apn.gov.ar
200.123.138.211	PTR	customer-static-123-138-211.iplannetworks.net
200.123.138.211	A	sib.gov.ar
200.123.138.229	PTR	customer-static-123-138-229.iplannetworks.net