Robtex

Up: 200.38.186.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 200.38.187.0/25
Down right: 200.38.187.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.38.187.13	PTR	host-200.38.187.13.infotec.com.mx
200.38.187.13	A	www.infotec.net.mx
200.38.187.13	A	infotec.edu.mx
200.38.187.15	PTR	host-200.38.187.15.infotec.com.mx
200.38.187.15	A	produccion.infotec.mx
200.38.187.19	PTR	host-200.38.187.19.infotec.com.mx