Robtex

Up: 181.119.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 181.119.128.0/22
Down right: 181.119.132.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
181.119.128.0	PTR	host0.181.119.128.ifxnw.com.ar
181.119.128.2	PTR	host2.181.119.128.ifxnw.com.ar
181.119.128.114	PTR	host114.181.119.128.ifxnw.com.ar
181.119.128.114	A	argentina-ca-version-2.expressnetw.com
181.119.128.118	PTR	host118.181.119.128.ifxnw.com.ar
181.119.128.165	PTR	host165.181.119.128.ifxnw.com.ar
181.119.128.165	A	ns2.gpm-md.com
181.119.128.165	A	ns2.3g-capita1.com
181.119.128.166	PTR	mail.security-note.com
181.119.128.173	PTR	host173.181.119.128.ifxnw.com.ar
181.119.128.198	PTR	host198.181.119.128.ifxnw.com.ar
181.119.128.198	A	ns1.coresecurity.com