Robtex

Up: 50.80.132.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 50.80.133.0/25
Down right: 50.80.133.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
50.80.133.1	A+PTR	50-80-133-1.client.mchsi.com
50.80.133.2	A+PTR	50-80-133-2.client.mchsi.com
50.80.133.5	A+PTR	50-80-133-5.client.mchsi.com
50.80.133.12	A+PTR	50-80-133-12.client.mchsi.com
50.80.133.18	A+PTR	50-80-133-18.client.mchsi.com
50.80.133.22	A+PTR	50-80-133-22.client.mchsi.com
50.80.133.28	A+PTR	50-80-133-28.client.mchsi.com
50.80.133.33	A+PTR	50-80-133-33.client.mchsi.com
50.80.133.50	A+PTR	50-80-133-50.client.mchsi.com
50.80.133.55	A+PTR	50-80-133-55.client.mchsi.com
50.80.133.58	A+PTR	50-80-133-58.client.mchsi.com
50.80.133.69	A+PTR	50-80-133-69.client.mchsi.com
50.80.133.74	A+PTR	50-80-133-74.client.mchsi.com
50.80.133.77	A+PTR	50-80-133-77.client.mchsi.com
50.80.133.83	A+PTR	50-80-133-83.client.mchsi.com
50.80.133.84	A+PTR	50-80-133-84.client.mchsi.com
50.80.133.86	A+PTR	50-80-133-86.client.mchsi.com
50.80.133.109	A+PTR	50-80-133-109.client.mchsi.com
50.80.133.113	A+PTR	50-80-133-113.client.mchsi.com
50.80.133.114	A+PTR	50-80-133-114.client.mchsi.com
50.80.133.123	A+PTR	50-80-133-123.client.mchsi.com
50.80.133.128	A+PTR	50-80-133-128.client.mchsi.com
50.80.133.130	A	50-80-133-130.client.mchsi.com
50.80.133.134	A+PTR	50-80-133-134.client.mchsi.com
50.80.133.135	A+PTR	50-80-133-135.client.mchsi.com
50.80.133.153	A+PTR	50-80-133-153.client.mchsi.com
50.80.133.158	A+PTR	50-80-133-158.client.mchsi.com
50.80.133.162	A+PTR	50-80-133-162.client.mchsi.com
50.80.133.163	A+PTR	50-80-133-163.client.mchsi.com
50.80.133.164	A+PTR	50-80-133-164.client.mchsi.com
50.80.133.169	A+PTR	50-80-133-169.client.mchsi.com
50.80.133.180	A+PTR	50-80-133-180.client.mchsi.com
50.80.133.195	A+PTR	50-80-133-195.client.mchsi.com
50.80.133.203	A+PTR	50-80-133-203.client.mchsi.com
50.80.133.212	A+PTR	50-80-133-212.client.mchsi.com
50.80.133.219	A+PTR	50-80-133-219.client.mchsi.com
50.80.133.220	A+PTR	50-80-133-220.client.mchsi.com
50.80.133.221	A+PTR	50-80-133-221.client.mchsi.com
50.80.133.222	A+PTR	50-80-133-222.client.mchsi.com
50.80.133.223	PTR	50-80-133-223.client.mchsi.com
50.80.133.223	A	dns3.cribbett.com
50.80.133.223	A	mail.cribbett.com
50.80.133.226	A+PTR	50-80-133-226.client.mchsi.com
50.80.133.236	A+PTR	50-80-133-236.client.mchsi.com
50.80.133.238	A+PTR	50-80-133-238.client.mchsi.com
50.80.133.240	A+PTR	50-80-133-240.client.mchsi.com
50.80.133.244	A+PTR	50-80-133-244.client.mchsi.com
50.80.133.249	A+PTR	50-80-133-249.client.mchsi.com
50.80.133.250	A+PTR	50-80-133-250.client.mchsi.com