Robtex

Up: 200.61.128.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 200.61.128.0/25
Down right: 200.61.128.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.61.128.0	A+PTR	0.128.61.200.host.ifxnw.com.ar
200.61.128.1	PTR	arbuenocbsdx1.ifxnw.com.ar
200.61.128.3	A+PTR	3.128.61.200.host.ifxnw.com.ar
200.61.128.130	A	arbuenocwwwx1.ifxnw.com.ar
200.61.128.131	A	ntweb.ifxnw.com.ar
200.61.128.131	A	www.pvla.com
200.61.128.131	A	arbuenocwwwx1winx1.ifxnw.com.ar
200.61.128.154	PTR	ws39.host4g.com
200.61.128.154	A	a.mx.oilium.com
200.61.128.154	A	a.mx.turga.com
200.61.128.244	PTR	arbuenoc7206x3.ifxnw.com.ar