Robtex

Up: 192.193.206.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.193.207.0/25
Down right: 192.193.207.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.193.207.41	A+PTR	nmxmty-edns01.banamex.com
192.193.207.41	A	nmxmty-edns01.credicard.com.br
192.193.207.41	A	nmxmty-edns01.banamex.com.mx
192.193.207.42	A+PTR	ns2.banamex.com
192.193.207.42	A	ns2.banamex.com.mx