Robtex

Up: 201.163.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 201.163.40.0/22
Down right: 201.163.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
201.163.42.162	PTR	static-201-163-42-162.alestra.net.mx
201.163.43.206	PTR	static-201-163-43-206.alestra.net.mx
201.163.43.210	A	ns01.rugo.com.mx
201.163.43.210	A	mail.rugo.com.mx
201.163.43.214	PTR	static-201-163-43-214.alestra.net.mx
201.163.46.6	A	mail.iosmexico.com
201.163.46.8	A	mail2.iosmexico.com
201.163.46.10	PTR	static-201-163-46-10.alestra.net.mx
201.163.46.16	A	luciernaga.ioscampestre.com
201.163.46.17	PTR	static-201-163-46-17.alestra.net.mx
201.163.46.18	A	iosexpress.com
201.163.46.22	A	josepato.com
201.163.46.22	A	mail.josepato.com
201.163.46.24	PTR	static-201-163-46-24.alestra.net.mx
201.163.46.24	A	iospage.iosoffices.com
201.163.46.24	A	interamericanadeenlace.com
201.163.46.33	A+PTR	mail.iosmexico.com
201.163.46.37	A	phplist1.iosreforma222.com
201.163.46.37	A	iosreforma222.com
201.163.46.51	PTR	static-201-163-46-51.alestra.net.mx
201.163.46.56	PTR	static-201-163-46-56.alestra.net.mx
201.163.46.65	PTR	static-201-163-46-65.alestra.net.mx
201.163.46.66	PTR	static-201-163-46-66.alestra.net.mx
201.163.46.67	PTR	static-201-163-46-67.alestra.net.mx
201.163.46.72	PTR	static-201-163-46-72.alestra.net.mx
201.163.46.83	PTR	static-201-163-46-83.alestra.net.mx
201.163.46.113	PTR	static-201-163-46-113.alestra.net.mx
201.163.46.146	PTR	static-201-163-46-146.alestra.net.mx
201.163.46.162	PTR	static-201-163-46-162.alestra.net.mx
201.163.46.163	PTR	static-201-163-46-163.alestra.net.mx
201.163.46.166	A	ciativa.com
201.163.46.166	A	www.ciativa.com
201.163.46.166	A	mail.ciativa.com
201.163.46.187	PTR	static-201-163-46-187.alestra.net.mx
201.163.46.194	PTR	static-201-163-46-194.alestra.net.mx
201.163.46.201	PTR	static-201-163-46-201.alestra.net.mx
201.163.46.202	PTR	static-201-163-46-202.alestra.net.mx
201.163.46.208	PTR	static-201-163-46-208.alestra.net.mx
201.163.46.218	PTR	static-201-163-46-218.alestra.net.mx
201.163.46.219	PTR	static-201-163-46-219.alestra.net.mx