Robtex

Up: 200.24.160.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 200.24.164.0/23
Down right: 200.24.166.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.24.164.95	PTR	host-200-24-164-95.telmex.com.pe
200.24.164.147	PTR	mail.bmp.com.pe
200.24.164.230	PTR	mail.optictradingcompany.com
200.24.164.230	PTR	mail.drasac.com.pe
200.24.165.19	PTR	host-200-24-165-19.telmex.com.pe
200.24.165.25	PTR	host-200-24-165-25.telmex.com.pe
200.24.165.28	PTR	host-200-24-165-28.telmex.com.pe
200.24.165.39	PTR	host-200-24-165-39.telmex.com.pe
200.24.165.99	PTR	host-200-24-165-99.telmex.com.pe
200.24.165.101	PTR	host-200-24-165-101.telmex.com.pe
200.24.165.109	PTR	host-200-24-165-109.telmex.com.pe
200.24.165.137	PTR	host-200-24-165-137.telmex.com.pe
200.24.165.172	PTR	host-200-24-165-172.telmex.com.pe
200.24.165.191	PTR	host-200-24-165-191.telmex.com.pe
200.24.165.234	PTR	host-200-24-165-234.telmex.com.pe
200.24.165.235	PTR	host-200-24-165-235.telmex.com.pe
200.24.165.237	PTR	host-200-24-165-237.telmex.com.pe
200.24.165.242	PTR	host-200-24-165-242.telmex.com.pe
200.24.166.3	PTR	host.ucsp.pe
200.24.166.3	PTR	mail.ucsp.pe
200.24.166.3	PTR	host-200-24-166-3.telmex.com.pe
200.24.166.12	PTR	mail.alprosa.com.pe
200.24.166.12	A+PTR	mail.tomasino.com.pe
200.24.166.12	A	mailserver.alprosa.com.pe
200.24.166.20	PTR	mail.gruporoberts.com
200.24.166.20	PTR	host-200-24-166-20.telmex.com.pe
200.24.166.43	PTR	host-200-24-166-43.telmex.com.pe
200.24.166.44	PTR	host-200-24-166-44.telmex.com.pe
200.24.166.46	PTR	host-200-24-166-46.telmex.com.pe
200.24.166.47	PTR	host-200-24-166-47.telmex.com.pe
200.24.166.48	PTR	host-200-24-166-48.telmex.com.pe
200.24.166.50	PTR	host-200-24-166-50.telmex.com.pe
200.24.166.51	PTR	host-200-24-166-51.telmex.com.pe
200.24.166.52	PTR	host-200-24-166-52.telmex.com.pe
200.24.166.53	PTR	host-200-24-166-53.telmex.com.pe
200.24.166.54	PTR	host-200-24-166-54.telmex.com.pe
200.24.166.55	PTR	host-200-24-166-55.telmex.com.pe
200.24.166.56	PTR	host-200-24-166-56.telmex.com.pe
200.24.166.57	PTR	host-200-24-166-57.telmex.com.pe
200.24.166.58	PTR	host-200-24-166-58.telmex.com.pe
200.24.166.59	PTR	host-200-24-166-59.telmex.com.pe
200.24.166.60	PTR	host-200-24-166-60.telmex.com.pe
200.24.166.61	PTR	host-200-24-166-61.telmex.com.pe
200.24.166.62	PTR	host-200-24-166-62.telmex.com.pe
200.24.166.63	PTR	host-200-24-166-63.telmex.com.pe
200.24.166.64	PTR	host-200-24-166-64.telmex.com.pe
200.24.166.75	PTR	merchants.dragonfans.com
200.24.166.75	PTR	www.dragonfans.com
200.24.166.75	PTR	www.sexonet.com
200.24.166.77	PTR	ns4.dragonfans.com
200.24.166.77	PTR	www.macaperu.com
200.24.166.77	PTR	host-200-24-166-77.telmex.com.pe
200.24.166.90	PTR	host-200-24-166-90.telmex.com.pe
200.24.166.90	A	mail.cajaincasur.com.pe
200.24.166.98	A+PTR	mail.cajaincasur.com.pe
200.24.166.99	PTR	host-200-24-166-99.telmex.com.pe
200.24.166.99	A	cajaincasur.com.pe
200.24.166.116	A	aeprescott.org.pe
200.24.167.0	PTR	host-200-24-167-0.telmex.com.pe
200.24.167.36	PTR	host-200-24-167-36.telmex.com.pe
200.24.167.51	PTR	host-200-24-167-51.telmex.com.pe
200.24.167.55	PTR	host-200-24-167-55.telmex.com.pe
200.24.167.56	PTR	host-200-24-167-56.telmex.com.pe
200.24.167.67	PTR	host-200-24-167-67.telmex.com.pe
200.24.167.80	PTR	host-200-24-167-80.telmex.com.pe
200.24.167.106	PTR	mail.securylogin.com
200.24.167.107	A	sysbtc.com
200.24.167.110	A	mail.rey.com.pe
200.24.167.110	A	mail.ggdk.us
200.24.167.126	PTR	host-200-24-167-126.telmex.com.pe
200.24.167.129	PTR	host-200-24-167-129.telmex.com.pe
200.24.167.153	PTR	host-200-24-167-153.telmex.com.pe
200.24.167.163	PTR	host-200-24-167-163.telmex.com.pe
200.24.167.181	PTR	host-200-24-167-181.telmex.com.pe
200.24.167.190	PTR	host-200-24-167-190.telmex.com.pe
200.24.167.196	PTR	host-200-24-167-196.telmex.com.pe
200.24.167.242	PTR	host-200-24-167-242.telmex.com.pe
200.24.167.250	PTR	host-200-24-167-250.telmex.com.pe