Robtex

Up: 87.103.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 87.103.144.0/21
Down right: 87.103.152.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.103.144.0	PTR	stc.0.144.103.87.krasnet.ru
87.103.144.210	PTR	stc.210.144.103.87.krasnet.ru
87.103.144.210	A	dns1.onkolog24.ru
87.103.144.210	A	onkolog24.ru
87.103.144.214	A	dns2.onkolog24.ru
87.103.144.214	A	mail.onkolog24.ru
87.103.144.243	PTR	dnm.243.144.103.87.dsl.krasnet.ru
87.103.144.243	A	www.xn----8sbabeilc2a1fdbkocq.xn--p1ai
87.103.144.243	A	web-registratura.ru
87.103.146.73	A	dnm.73.146.103.87.dsl.krasnet.ru
87.103.147.104	A	dnm.104.147.103.87.dsl.krasnet.ru
87.103.147.153	A	dnm.153.147.103.87.dsl.krasnet.ru
87.103.147.224	A	dnm.224.147.103.87.dsl.krasnet.ru
87.103.147.242	A	dnm.242.147.103.87.dsl.krasnet.ru
87.103.148.98	A	dnm.98.148.103.87.dsl.krasnet.ru
87.103.148.130	A	dnm.130.148.103.87.dsl.krasnet.ru
87.103.148.189	A	dnm.189.148.103.87.dsl.krasnet.ru
87.103.148.228	A	dnm.228.148.103.87.dsl.krasnet.ru
87.103.150.199	A	dnm.199.150.103.87.dsl.krasnet.ru
87.103.152.41	PTR	kris.ru
87.103.152.42	PTR	lotus.kris.ru
87.103.152.98	PTR	mail.enifon.ru
87.103.155.0	PTR	dnm.0.155.103.87.dsl.krasnet.ru
87.103.155.20	A	dnm.20.155.103.87.dsl.krasnet.ru
87.103.155.105	A	dnm.105.155.103.87.dsl.krasnet.ru
87.103.155.117	A	dnm.117.155.103.87.dsl.krasnet.ru
87.103.155.127	A	dnm.127.155.103.87.dsl.krasnet.ru
87.103.156.201	A	xn----8sbivahaxidavejrlug.xn--p1ai
87.103.157.148	A	krsk.sibmoku.ru
87.103.157.210	PTR	stc.210.157.103.87.dsl.krasnet.ru
87.103.157.210	A	partizansk-edu.ru
87.103.157.210	A	smtp.ushur.ru
87.103.159.176	PTR	stc.176.159.103.87.dsl.krasnet.ru
87.103.159.176	A	postmaster.kraspharma.krsk.ru
87.103.159.255	A	stc.255.159.103.87.dsl.krasnet.ru