Robtex

Up: 200.52.136.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 200.52.136.0/25
Down right: 200.52.136.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.52.136.1	A+PTR	idcdns3.protel.net.mx
200.52.136.6	A	plnx01.inext.net.mx
200.52.136.6	A	construsistem.com.mx
200.52.136.10	PTR	mail.i-next.ws
200.52.136.10	A	mail.construsistem.com.mx
200.52.136.10	A	mail.inext.com.mx
200.52.136.12	PTR	mail.protelinext.net
200.52.136.16	A	appserver1.protel.net.mx
200.52.136.20	A	correo.topnet.com.mx
200.52.136.20	A	correo.grupotm.mx
200.52.136.20	A	correo.bariswimwear.com
200.52.136.21	PTR	redip21.idcmex.inext.net.mx
200.52.136.21	A	topnet.com.mx
200.52.136.21	A	casacom.net.mx
200.52.136.33	PTR	redip33.idcmex.inext.net.mx
200.52.136.200	PTR	redip200.idcmex.inext.net.mx
200.52.136.200	A	xpertus.com.mx