Robtex

Up: 201.156.36.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 201.156.37.0/25
Down right: 201.156.37.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
201.156.37.42	A+PTR	na-201-156-37-42.static.avantel.net.mx
201.156.37.42	A	dualche.com
201.156.37.43	A+PTR	na-201-156-37-43.static.avantel.net.mx
201.156.37.43	A	wifiartisoft.ddns.net
201.156.37.43	A	www.wificoppel.com
201.156.37.108	A+PTR	na-201-156-37-108.static.avantel.net.mx
201.156.37.170	A	nethost.pro