Robtex

Up: 200.6.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 200.6.136.0/22
Down right: 200.6.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.6.136.5	A	158.ds-net.com.ar
200.6.136.5	A	135.ds-net.com.ar
200.6.136.5	A	178.ds-net.com.ar
200.6.136.33	PTR	33-136-pppoe-dial.toppnetdns.com.br.136.6.200.in-addr.arpa
200.6.137.74	PTR	74-137-pppoe-dial.toppnetdns.com.br.137.6.200.in-addr.arpa
200.6.137.213	PTR	213-137-pppoe-dial.toppnetdns.com.br.137.6.200.in-addr.arpa
200.6.138.2	PTR	2-138-pppoe-dial.toppnetdns.com.br.138.6.200.in-addr.arpa
200.6.138.77	PTR	77-138-pppoe-dial.toppnetdns.com.br.138.6.200.in-addr.arpa
200.6.140.190	PTR	190-140-pppoe-dial.toppnetdns.com.br.140.6.200.in-addr.arpa
200.6.141.3	PTR	3-141-pppoe-dial.toppnetdns.com.br.141.6.200.in-addr.arpa
200.6.142.141	PTR	141-142-pppoe-dial.toppnetdns.com.br.142.6.200.in-addr.arpa
200.6.143.5	A	143.172.webstoresplus.com