Robtex

Up: 80.240.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 80.240.40.0/22
Down right: 80.240.44.0/22

IP	Type	Hostname
80.240.40.0	PTR	unnamed.sibttk.net
80.240.40.8	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.18	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.24	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.25	PTR	unnamed.sibttk.net
80.240.40.32	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.40	PTR	unnamed.sibttk.net
80.240.40.41	PTR	unnamed.sibttk.net
80.240.40.42	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.43	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.48	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.51	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.56	PTR	unnamed.sibttk.net
80.240.40.57	PTR	unnamed.sibttk.net
80.240.40.66	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.82	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.88	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.90	PTR	unnamed.sibttk.net
80.240.40.98	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.99	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.105	PTR	unnamed.sibttk.net
80.240.40.107	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.112	PTR	unnamed.sibttk.net
80.240.40.113	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.114	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.115	PTR	unnamed.sibttk.net
80.240.40.121	PTR	unnamed.sibttk.net
80.240.40.122	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.129	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.137	PTR	unnamed.sibttk.net
80.240.40.139	PTR	unnamed.sibttk.net
80.240.40.145	PTR	unnamed.sibttk.net
80.240.40.152	PTR	unnamed.sibttk.net
80.240.40.153	PTR	unnamed.sibttk.net
80.240.40.161	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.168	PTR	unnamed.sibttk.net
80.240.40.170	PTR	unnamed.sibttk.net
80.240.40.184	PTR	unnamed.sibttk.net
80.240.40.186	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.195	PTR	ks13-v.ks-lomo-100-1-1-2.f03.sibttk.net
80.240.40.203	PTR	unnamed.sibttk.net
80.240.40.209	PTR	unnamed.sibttk.net
80.240.40.210	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.218	PTR	unnamed.sibttk.net
80.240.40.219	PTR	unnamed.sibttk.net
80.240.40.225	PTR	unnamed.sibttk.net
80.240.40.233	PTR	unnamed.sibttk.net
80.240.40.234	PTR	unnamed.sibttk.net
80.240.40.241	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.40.248	PTR	unnamed.sibttk.net
80.240.40.250	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.41.86	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.41.97	PTR	pppoe.zlg18-nbr28.sibttk.net
80.240.43.241	PTR	pppoe.zlg-1-bng018.sibttk.net
80.240.43.255	PTR	sibttk.net
80.240.44.0	PTR	pppoe.krsk-1-bng036.sibttk.net
80.240.44.130	PTR	unnamed.sibttk.net
80.240.44.176	PTR	cpe-pppoe.zlg-1-bng018.sibttk.net
80.240.44.204	A	benio.ru
80.240.44.226	PTR	cpe-pppoe.zlg18-nbr28.sibttk.net
80.240.44.226	A	ns1.segun24.ru
80.240.44.228	A+PTR	spzgr.ru
80.240.44.228	A	mail.spzgr.ru
80.240.44.228	A	ns.spzgr.ru
80.240.45.78	PTR	cpe-pppoe.zlg18-nbr28.sibttk.net
80.240.45.255	PTR	sibttk.net
80.240.46.0	PTR	sibttk.net
80.240.46.146	PTR	cpe-pppoe.zlg18-nbr28.sibttk.net
80.240.46.187	PTR	cpe-pppoe.zlg18-nbr28.sibttk.net
80.240.46.255	PTR	sibttk.net
80.240.47.0	PTR	sibttk.net
80.240.47.255	PTR	sibttk.net