Robtex

Up: 83.136.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 83.136.28.0/23
Down right: 83.136.30.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
83.136.28.0	PTR	wan1.comstar.ru
83.136.28.33	PTR	cr-xxx-vlyyyy.moscow.comstar.ru
83.136.28.82	A+PTR	mail.comedyclub.ru
83.136.28.130	A+PTR	payd.ru
83.136.28.130	A	mail.payd.ru
83.136.28.194	PTR	wan1.comstar.ru
83.136.28.194	A	mail.vosmoi.ru
83.136.28.241	PTR	bs-alekseevskaya.comstar.ru
83.136.28.242	PTR	bs-alekseevskaya.comstar.ru
83.136.28.250	PTR	mx.sftgroup.ru
83.136.28.255	PTR	wan1.comstar.ru
83.136.29.12	A	ftp.okbsapr.ru
83.136.29.14	A	smtp.shipka.ru
83.136.29.42	PTR	mx.welltex.ru
83.136.29.42	A	textilefactory.ru
83.136.29.42	A	moda-on-line.ru
83.136.29.96	PTR	free.moscow.access.comstar.ru
83.136.29.120	PTR	free.moscow.access.comstar.ru
83.136.29.131	A	www.tenzor.net
83.136.29.131	A	tenzor.net
83.136.29.132	A+PTR	mail.tenzor.net
83.136.29.237	A+PTR	mail.bankrmp.ru
83.136.30.130	A+PTR	ftp.oldi.ru
83.136.30.131	A	ns1.oldi.ru
83.136.30.135	A	schuco.ru
83.136.30.135	A	schuco.su
83.136.30.137	A	mail.3cott.com
83.136.30.145	A	www.plastok.ru
83.136.30.145	A	mirado.ru
83.136.30.145	A	tochkadostupa-info.ru
83.136.30.149	A	ftp.expertcomp.ru
83.136.30.161	A	mail.plastok.ru
83.136.30.162	A	mail.expertcomp.ru
83.136.30.163	A	mail.eandc-info.ru
83.136.30.164	A	mail.tochkadostupa-info.ru
83.136.30.165	A	mail.asustek.ru
83.136.30.166	A	mail.asus-nb.ru
83.136.30.167	A+PTR	mail.gmini.com
83.136.30.168	A	mail.x-ring.ru
83.136.30.169	A	mail.mfaudit.ru
83.136.30.170	A+PTR	mail.mailgid.ru
83.136.30.171	A+PTR	mail.mailru24.ru
83.136.30.172	A	mail.staten.ru
83.136.30.173	A+PTR	mail.systehno.ru
83.136.30.174	A	mail.unit-electronics.com
83.136.30.175	A+PTR	mail.oldi.ru
83.136.30.251	A	boltino2014.ru