Robtex

Up: 185.28.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 185.28.16.0/23
Down right: 185.28.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.28.16.34	A	mail.veotech.pl
185.28.17.82	A+PTR	intra.montex.pl
185.28.17.100	A	mail.masterserver.pl
185.28.17.100	A	ns2.mastersrv.pl
185.28.17.100	A	masterserver.pl
185.28.18.2	A+PTR	mx0302.twoj-shopping.pl
185.28.18.3	A+PTR	mx0202.salelifter.com
185.28.18.4	A+PTR	mx0203.salelifter.com
185.28.18.5	A+PTR	mx0204.salelifter.com
185.28.18.6	A+PTR	mx0304.salelifter.com
185.28.18.129	PTR	do_ggc.s-net.pl
185.28.18.130	PTR	cache.google.com
185.28.18.132	PTR	cache.google.com
185.28.18.133	PTR	cache.google.com
185.28.18.134	PTR	cache.google.com
185.28.18.195	A+PTR	mx0301.salelifter.com
185.28.18.195	A	dc-c816db64.traderclub.pl
185.28.18.196	A	jubilerkwasniak.pl
185.28.18.197	A+PTR	mx0302.salelifter.com
185.28.18.198	A+PTR	mx0301.twoj-shopping.pl
185.28.18.202	A+PTR	r1.s-net.pl
185.28.18.203	A+PTR	r2.s-net.pl
185.28.18.218	A	mail.naprawimyto.pl
185.28.18.219	A+PTR	mx0301.przemysl-to.pl
185.28.18.220	A+PTR	mx6.ecampaign.pl
185.28.18.221	A+PTR	mx0302.przemysl-to.pl
185.28.18.222	A+PTR	mx62.ecampaign.pl
185.28.18.250	A+PTR	mx63.ecampaign.pl
185.28.18.251	A+PTR	mx64.ecampaign.pl
185.28.18.252	A+PTR	mx0303.salelifter.com
185.28.18.253	PTR	server2.tracktoblare.com
185.28.18.254	A+PTR	mx0201.salelifter.com
185.28.19.3	A	www.kcri.org
185.28.19.41	PTR	gateway.kcm.pl
185.28.19.42	PTR	router.kcm.pl
185.28.19.42	A	www.kcm.pl
185.28.19.42	A	gateway.kcm.pl
185.28.19.43	PTR	kcm.pl
185.28.19.44	PTR	poczta.kcm.pl
185.28.19.45	PTR	kliny.com
185.28.19.46	PTR	osteoporoza.pl
185.28.19.123	A	deneb.ekosystem.pl
185.28.19.124	A	crater.ekosystem.pl
185.28.19.158	A	codiblylabs.com
185.28.19.178	A	foliograf.net
185.28.19.178	A	mx.foliograf.net