Robtex

Up: 217.28.220.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 217.28.220.0/24
Down right: 217.28.221.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.28.220.2	A+PTR	c2691-dimpr4-nsk.sibcom.net
217.28.220.12	A+PTR	c2950-c1-ceh3-nsk.sibcom.net
217.28.220.15	A	leshoz.biz
217.28.220.18	A+PTR	ns.sibcom.net
217.28.220.19	A+PTR	srvbill.sibcom.net
217.28.220.20	A+PTR	srvgate.sibcom.net
217.28.220.20	A	mx.sibcom.net.ru
217.28.220.20	A	sibcom.net.ru
217.28.220.21	PTR	mx.sibcom.net.ru
217.28.220.21	A	sibcom.net
217.28.220.22	A+PTR	srvcall.sibcom.net
217.28.220.46	PTR	c1242ag-mega-nsk.sibcom.net
217.28.220.51	A	c2691-dimpr4-nsk.sibcom.net
217.28.220.82	A	booksong.ru
217.28.221.10	A+PTR	jupiter.sib3.ru
217.28.221.10	A	www.sib3.ru
217.28.221.10	A	plmpedia.ru
217.28.221.11	PTR	saturn.ledas.com
217.28.221.139	PTR	rmconsulting.ru
217.28.221.139	PTR	mail.rmconsulting.ru
217.28.221.139	A+PTR	service.restorator.su
217.28.221.252	A	hostcp.ru