Robtex

Up: 185.128.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 185.128.20.0/25
Down right: 185.128.20.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.128.20.1	PTR	gw.dx4.pl
185.128.20.2	PTR	gw2.dx4.pl
185.128.20.3	PTR	3.pool1.dx4.pl
185.128.20.4	PTR	4.pool1.dx4.pl
185.128.20.5	PTR	5.pool1.dx4.pl
185.128.20.6	PTR	6.pool1.dx4.pl
185.128.20.7	PTR	8.pool1.dx4.pl
185.128.20.8	PTR	9.pool1.dx4.pl
185.128.20.8	A	mx1.dx4.pl
185.128.20.9	PTR	9.pool1.dx4.pl
185.128.20.10	A+PTR	sip.dx4.pl
185.128.20.11	A+PTR	plicbd1.dx4.pl
185.128.20.12	A+PTR	plicbd2.dx4.pl
185.128.20.13	PTR	13.pool1.dx4.pl
185.128.20.14	PTR	14.pool1.dx4.pl
185.128.20.15	PTR	15.pool1.dx4.pl
185.128.20.15	A	elend.pl
185.128.20.16	A+PTR	ns1.dx4.pl
185.128.20.16	A	kronos.symetra.pl
185.128.20.16	A	ns1.symetra.pl
185.128.20.17	A+PTR	ns2.dx4.pl
185.128.20.18	PTR	gw.symetra.pl
185.128.20.18	A	www.dx4.pl
185.128.20.18	A	www.symetra.pl
185.128.20.19	PTR	19.pool1.dx4.pl
185.128.20.20	A+PTR	gw.symetra.pl
185.128.20.21	A+PTR	noc.dx4.pl
185.128.20.22	A+PTR	ots.symetra.pl
185.128.20.23	A+PTR	noc.symetra.pl
185.128.20.24	A+PTR	tst.symetra.pl
185.128.20.25	PTR	25.pool1.dx4.pl
185.128.20.26	PTR	26.pool1.dx4.pl
185.128.20.27	PTR	27.pool1.dx4.pl
185.128.20.28	PTR	28.pool1.dx4.pl
185.128.20.29	PTR	29.pool1.dx4.pl
185.128.20.30	PTR	30.pool1.dx4.pl
185.128.20.31	PTR	31.pool1.dx4.pl
185.128.20.32	PTR	32.pool1.dx4.pl
185.128.20.33	PTR	33.pool1.dx4.pl
185.128.20.34	PTR	34.pool1.dx4.pl
185.128.20.35	PTR	35.pool1.dx4.pl
185.128.20.36	PTR	36.pool1.dx4.pl
185.128.20.252	PTR	252.pool1.dx4.pl
185.128.20.253	A+PTR	symvpn.symetra.pl
185.128.20.254	A	vpn.symetra.pl