Robtex

Up: 5.42.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 5.42.40.0/22
Down right: 5.42.44.0/22

IP	Type	Hostname
5.42.44.16	PTR	5-42-44-16.colomna.net
5.42.44.42	PTR	5-42-44-42.colomna.net
5.42.44.82	PTR	5-42-44-82.colomna.net
5.42.44.89	PTR	5-42-44-89.colomna.net
5.42.44.120	PTR	5-42-44-120.colomna.net
5.42.44.137	PTR	5-42-44-137.colomna.net
5.42.44.138	PTR	5-42-44-138.colomna.net
5.42.44.168	PTR	5-42-44-168.colomna.net
5.42.44.192	PTR	5-42-44-192.colomna.net
5.42.44.193	PTR	5-42-44-193.colomna.net
5.42.44.209	PTR	5-42-44-209.colomna.net
5.42.44.234	PTR	5-42-44-234.colomna.net
5.42.45.27	PTR	5-42-45-27.colomna.net
5.42.45.50	PTR	5-42-45-50.colomna.net
5.42.45.58	PTR	5-42-45-58.colomna.net
5.42.45.98	PTR	5-42-45-98.colomna.net
5.42.45.105	PTR	5-42-45-105.colomna.net
5.42.45.113	PTR	5-42-45-113.colomna.net
5.42.45.114	PTR	5-42-45-114.colomna.net
5.42.45.128	PTR	5-42-45-128.colomna.net
5.42.45.147	PTR	5-42-45-147.colomna.net
5.42.45.200	PTR	5-42-45-200.colomna.net
5.42.45.241	PTR	5-42-45-241.colomna.net
5.42.46.80	PTR	5-42-46-80.colomna.net
5.42.46.82	PTR	5-42-46-82.colomna.net
5.42.46.88	PTR	5-42-46-88.colomna.net
5.42.46.106	PTR	5-42-46-106.colomna.net
5.42.46.155	PTR	5-42-46-155.colomna.net
5.42.46.177	PTR	5-42-46-177.colomna.net
5.42.47.9	PTR	5-42-47-9.colomna.net
5.42.47.41	PTR	5-42-47-41.colomna.net
5.42.47.66	PTR	5-42-47-66.colomna.net
5.42.47.74	PTR	5-42-47-74.colomna.net
5.42.47.99	PTR	5-42-47-99.colomna.net
5.42.47.130	PTR	5-42-47-130.colomna.net
5.42.47.137	PTR	5-42-47-137.colomna.net
5.42.47.153	PTR	5-42-47-153.colomna.net
5.42.47.154	PTR	5-42-47-154.colomna.net
5.42.47.192	PTR	5-42-47-192.colomna.net
5.42.47.202	PTR	5-42-47-202.colomna.net