Robtex

Up: 45.140.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 45.140.43.0/25
Down right: 45.140.43.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
45.140.43.33	A+PTR	mail0.marketing-na-web0.com.br
45.140.43.33	A	www.marketing-na-web0.com.br
45.140.43.33	A	marketing-na-web0.com.br
45.140.43.34	A+PTR	mail1.marketing-na-web0.com.br
45.140.43.34	A	marketing-na-web0.com.br
45.140.43.34	A	ns2.marketing-na-web0.com.br