Robtex

Up: 189.126.128.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 189.126.132.0/23
Down right: 189.126.134.0/23

IP	Type	Hostname
189.126.133.29	PTR	189-126-133-29.tracedns.com.br.133.126.189.in-addr.arpa
189.126.135.1	PTR	gw.ibtelecom.net.br
189.126.135.4	PTR	189-126-135-4.ibtelecom.net.br
189.126.135.8	PTR	189-126-135-8.ibtelecom.net.br
189.126.135.10	PTR	189-126-135-10.ibtelecom.net.br
189.126.135.108	PTR	correct.comprapakas.com
189.126.135.109	PTR	zinc.comprapakas.com
189.126.135.115	PTR	favourite.comprapakas.com
189.126.135.134	PTR	accrue.vivavender.com
189.126.135.183	PTR	pleasant.compradisse.com
189.126.135.211	PTR	snw01tib.tibahia.com
189.126.135.214	PTR	189-126-135-214.ibtelecom.net.br