Robtex

Up: 200.52.192.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 200.52.196.0/23
Down right: 200.52.198.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.52.196.0	PTR	customer-gdl-196-0.megared.net.mx
200.52.196.1	PTR	customer-gdl-196-1.megared.net.mx
200.52.196.2	PTR	customer-gdl-196-2.megared.net.mx
200.52.196.3	PTR	customer-gdl-196-3.megared.net.mx
200.52.196.4	PTR	customer-gdl-196-4.megared.net.mx
200.52.196.5	PTR	customer-gdl-196-5.megared.net.mx
200.52.196.6	PTR	customer-gdl-196-6.megared.net.mx
200.52.196.7	PTR	customer-gdl-196-7.megared.net.mx
200.52.196.8	PTR	customer-gdl-196-8.megared.net.mx
200.52.196.9	PTR	customer-gdl-196-9.megared.net.mx
200.52.196.10	PTR	customer-gdl-196-10.megared.net.mx
200.52.196.11	PTR	customer-gdl-196-11.megared.net.mx
200.52.196.12	PTR	customer-gdl-196-12.megared.net.mx
200.52.196.13	PTR	customer-gdl-196-13.megared.net.mx
200.52.196.14	PTR	customer-gdl-196-14.megared.net.mx
200.52.196.15	PTR	customer-gdl-196-15.megared.net.mx
200.52.196.16	PTR	customer-gdl-196-16.megared.net.mx
200.52.196.17	PTR	customer-gdl-196-17.megared.net.mx
200.52.196.18	PTR	customer-gdl-196-18.megared.net.mx
200.52.196.99	PTR	customer-gdl-196-99.megared.net.mx
200.52.196.99	A	mail.noc.megared.net.mx
200.52.196.125	PTR	portalweb.megacable.com.mx
200.52.196.125	A	www.megared.mx
200.52.196.125	A	mail.igw.cz
200.52.196.162	PTR	customer-gdl-196-162.megared.net.mx
200.52.196.175	PTR	customer-gdl-196-175.megared.net.mx
200.52.196.176	PTR	customer-gdl-196-176.megared.net.mx
200.52.196.179	A	fs.megacable.com.mx
200.52.196.196	PTR	customer-gdl-196-196.megared.net.mx
200.52.196.200	PTR	customer-gdl-196-200.megared.net.mx
200.52.196.200	A	dns2.megared.net.mx
200.52.196.241	PTR	customer-gdl-196-241.megared.net.mx
200.52.196.241	A	apps.megacable.com.mx
200.52.196.246	PTR	customer-gdl-196-246.megared.net.mx
200.52.197.39	PTR	customer-gdl-197-39.megared.net.mx
200.52.199.5	PTR	customer-gdl-199-5.megared.net.mx
200.52.199.12	PTR	customer-gdl-199-12.megared.net.mx
200.52.199.18	PTR	customer-gdl-199-18.megared.net.mx
200.52.199.22	PTR	customer-gdl-199-22.megared.net.mx
200.52.199.23	PTR	customer-gdl-199-23.megared.net.mx
200.52.199.29	PTR	customer-gdl-199-29.megared.net.mx
200.52.199.32	PTR	customer-gdl-199-32.megared.net.mx
200.52.199.35	PTR	customer-gdl-199-35.megared.net.mx
200.52.199.36	PTR	customer-gdl-199-36.megared.net.mx
200.52.199.43	PTR	customer-gdl-199-43.megared.net.mx
200.52.199.50	PTR	customer-gdl-199-50.megared.net.mx
200.52.199.52	PTR	customer-gdl-199-52.megared.net.mx
200.52.199.53	PTR	customer-gdl-199-53.megared.net.mx
200.52.199.56	PTR	customer-gdl-199-56.megared.net.mx
200.52.199.61	PTR	customer-gdl-199-61.megared.net.mx
200.52.199.62	PTR	customer-gdl-199-62.megared.net.mx
200.52.199.64	PTR	customer-gdl-199-64.megared.net.mx
200.52.199.67	PTR	customer-gdl-199-67.megared.net.mx
200.52.199.69	PTR	customer-gdl-199-69.megared.net.mx
200.52.199.70	PTR	customer-gdl-199-70.megared.net.mx
200.52.199.75	PTR	customer-gdl-199-75.megared.net.mx
200.52.199.76	PTR	customer-gdl-199-76.megared.net.mx
200.52.199.81	PTR	customer-gdl-199-81.megared.net.mx
200.52.199.86	PTR	customer-gdl-199-86.megared.net.mx
200.52.199.88	PTR	customer-gdl-199-88.megared.net.mx
200.52.199.92	PTR	customer-gdl-199-92.megared.net.mx
200.52.199.93	PTR	customer-gdl-199-93.megared.net.mx
200.52.199.101	PTR	customer-gdl-199-101.megared.net.mx
200.52.199.104	PTR	customer-gdl-199-104.megared.net.mx
200.52.199.105	PTR	customer-gdl-199-105.megared.net.mx
200.52.199.109	PTR	customer-gdl-199-109.megared.net.mx
200.52.199.111	PTR	customer-gdl-199-111.megared.net.mx
200.52.199.113	PTR	customer-gdl-199-113.megared.net.mx
200.52.199.116	PTR	customer-gdl-199-116.megared.net.mx
200.52.199.127	PTR	customer-gdl-199-127.megared.net.mx
200.52.199.130	PTR	customer-gdl-199-130.megared.net.mx
200.52.199.133	PTR	customer-gdl-199-133.megared.net.mx
200.52.199.134	PTR	customer-gdl-199-134.megared.net.mx
200.52.199.147	PTR	customer-gdl-199-147.megared.net.mx
200.52.199.152	PTR	customer-gdl-199-152.megared.net.mx
200.52.199.156	PTR	customer-gdl-199-156.megared.net.mx
200.52.199.157	PTR	customer-gdl-199-157.megared.net.mx
200.52.199.159	PTR	customer-gdl-199-159.megared.net.mx
200.52.199.160	PTR	customer-gdl-199-160.megared.net.mx
200.52.199.162	PTR	customer-gdl-199-162.megared.net.mx
200.52.199.169	PTR	customer-gdl-199-169.megared.net.mx
200.52.199.170	PTR	customer-gdl-199-170.megared.net.mx
200.52.199.171	PTR	customer-gdl-199-171.megared.net.mx
200.52.199.176	PTR	customer-gdl-199-176.megared.net.mx
200.52.199.177	PTR	customer-gdl-199-177.megared.net.mx
200.52.199.178	PTR	customer-gdl-199-178.megared.net.mx
200.52.199.182	PTR	customer-gdl-199-182.megared.net.mx
200.52.199.188	PTR	customer-gdl-199-188.megared.net.mx
200.52.199.191	PTR	customer-gdl-199-191.megared.net.mx
200.52.199.193	PTR	customer-gdl-199-193.megared.net.mx
200.52.199.196	PTR	customer-gdl-199-196.megared.net.mx
200.52.199.201	PTR	customer-gdl-199-201.megared.net.mx
200.52.199.202	PTR	customer-gdl-199-202.megared.net.mx
200.52.199.204	PTR	customer-gdl-199-204.megared.net.mx
200.52.199.212	PTR	customer-gdl-199-212.megared.net.mx
200.52.199.214	PTR	customer-gdl-199-214.megared.net.mx
200.52.199.215	PTR	customer-gdl-199-215.megared.net.mx
200.52.199.219	PTR	customer-gdl-199-219.megared.net.mx
200.52.199.222	PTR	customer-gdl-199-222.megared.net.mx
200.52.199.224	PTR	customer-gdl-199-224.megared.net.mx
200.52.199.227	PTR	customer-gdl-199-227.megared.net.mx
200.52.199.228	PTR	customer-gdl-199-228.megared.net.mx
200.52.199.229	PTR	customer-gdl-199-229.megared.net.mx
200.52.199.236	PTR	customer-gdl-199-236.megared.net.mx
200.52.199.237	PTR	customer-gdl-199-237.megared.net.mx
200.52.199.244	PTR	customer-gdl-199-244.megared.net.mx
200.52.199.245	PTR	customer-gdl-199-245.megared.net.mx
200.52.199.247	PTR	customer-gdl-199-247.megared.net.mx
200.52.199.249	PTR	customer-gdl-199-249.megared.net.mx
200.52.199.250	PTR	customer-gdl-199-250.megared.net.mx
200.52.199.253	PTR	customer-gdl-199-253.megared.net.mx