Robtex

Up: 46.0.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 46.0.240.0/23
Down right: 46.0.242.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
46.0.240.0	PTR	46x0x240x0.static-customer.samara.ertelecom.ru
46.0.240.5	PTR	46x0x240x5.static-customer.samara.ertelecom.ru
46.0.240.10	PTR	46x0x240x10.static-customer.samara.ertelecom.ru
46.0.240.17	PTR	46x0x240x17.static-customer.samara.ertelecom.ru
46.0.240.36	PTR	46x0x240x36.static-customer.samara.ertelecom.ru
46.0.240.40	PTR	46x0x240x40.static-customer.samara.ertelecom.ru
46.0.240.41	PTR	46x0x240x41.static-customer.samara.ertelecom.ru
46.0.240.45	PTR	46x0x240x45.static-customer.samara.ertelecom.ru
46.0.240.46	PTR	46x0x240x46.static-customer.samara.ertelecom.ru
46.0.240.48	PTR	46x0x240x48.static-customer.samara.ertelecom.ru
46.0.240.53	PTR	46x0x240x53.static-customer.samara.ertelecom.ru
46.0.240.82	PTR	46x0x240x82.static-customer.samara.ertelecom.ru
46.0.240.156	PTR	46x0x240x156.static-customer.samara.ertelecom.ru
46.0.241.57	PTR	46x0x241x57.static.samara.ertelecom.ru
46.0.241.98	PTR	46x0x241x98.static-customer.samara.ertelecom.ru
46.0.241.101	PTR	46x0x241x101.static-customer.samara.ertelecom.ru
46.0.241.101	A	mail.mdou19.ru
46.0.241.101	A	phv-sch1.ru
46.0.241.103	PTR	46x0x241x103.static-customer.samara.ertelecom.ru
46.0.241.104	PTR	shared-1h.hostspectr.net
46.0.241.104	A	www.jumuro.ru
46.0.241.107	PTR	shared-1h.hostspectr.net
46.0.241.111	PTR	46x0x241x111.static-customer.samara.ertelecom.ru
46.0.241.111	A	detskiy-sad-120.ru
46.0.241.111	A	www.gymnasium-4.ru
46.0.241.113	PTR	46x0x241x113.static-customer.samara.ertelecom.ru
46.0.241.113	A	www.asurso.ru
46.0.241.113	A	asurso.ru
46.0.241.116	A+PTR	shared-1h.hostspectr.net
46.0.241.116	A	hostspectr.com
46.0.241.116	A	hostspectr.net
46.0.241.119	PTR	codeby.net
46.0.241.121	A	mail.wexnz.info
46.0.241.121	A	www.wexnz.info
46.0.241.121	A	wexnz.info
46.0.241.125	PTR	shared-1h.hostspectr.net
46.0.241.125	A	pgenom.com
46.0.242.137	PTR	46x0x242x137.static-customer.samara.ertelecom.ru
46.0.242.198	PTR	46x0x242x198.static-customer.samara.ertelecom.ru