Robtex

Up: 201.159.80.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 201.159.80.0/25
Down right: 201.159.80.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
201.159.80.194	A+PTR	mail2.irt.com.mx
201.159.80.194	A	mail2.gruporoa.com
201.159.80.194	A	mail2.aeroroa.com
201.159.80.197	PTR	ns01.irt.com.mx
201.159.80.197	A	mail.01800eventos.org
201.159.80.197	A	mail.01800eventos.com