Robtex

Up: 80.90.0.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 80.90.0.0/25
Down right: 80.90.0.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.90.0.0	PTR	ip-80-90-0-0.ax5z.com
80.90.0.1	A+PTR	dns1.datagrupa.lv
80.90.0.2	PTR	ip0-02.datagrupa.lv
80.90.0.3	A+PTR	dns3.datagrupa.lv
80.90.0.3	A	proxy.datagrupa.lv
80.90.0.5	PTR	ip0-05.datagrupa.lv
80.90.0.5	A	mkl-mit.lv
80.90.0.5	A	cirks.lv
80.90.0.7	PTR	web1.datagrupa.lv
80.90.0.7	A	datagroup.info
80.90.0.7	A	web.datagrupa.lv
80.90.0.9	A+PTR	ns.datagrupa.lv
80.90.0.10	PTR	ip0-10.datagrupa.lv
80.90.0.10	A	biotude.eu
80.90.0.10	A	www.siberika.eu
80.90.0.14	PTR	ge02.190.c2.datagrupa.lv
80.90.0.70	A+PTR	spider.datagrupa.lv
80.90.0.71	PTR	ip-80-90-0-71.ax5z.com
80.90.0.71	A	tarantula.datagrupa.lv
80.90.0.72	PTR	ip0-72.datagrupa.lv
80.90.0.81	PTR	ip0-81.datagrupa.lv
80.90.0.82	PTR	ip0-82.datagrupa.lv
80.90.0.88	PTR	ip0-88.datagrupa.lv
80.90.0.91	PTR	ip0-91.datagrupa.lv
80.90.0.92	PTR	ip0-92.datagrupa.lv
80.90.0.98	PTR	ip0-98.datagrupa.lv
80.90.0.127	PTR	ip-80-90-0-127.ax5z.com
80.90.0.128	PTR	ip-80-90-0-128.ax5z.com
80.90.0.131	PTR	forevers.lv
80.90.0.135	PTR	ip0-135.datagroup.info
80.90.0.136	PTR	ip0-136.datagroup.info
80.90.0.139	PTR	ip0-139.datagroup.info
80.90.0.156	PTR	ip0-156.datagrupa.lv
80.90.0.159	PTR	ip0-159.datagrupa.lv
80.90.0.162	PTR	ge00-200.c2.datagrupa.lv
80.90.0.170	PTR	ip0-170.datagrupa.lv
80.90.0.192	PTR	ip0-192.datagrupa.lv
80.90.0.195	PTR	ip0-195.datagrupa.lv
80.90.0.199	PTR	ip0-199.datagrupa.lv
80.90.0.203	PTR	ip0-203.datagrupa.lv
80.90.0.208	PTR	ip0-208.datagrupa.lv
80.90.0.210	PTR	ip0-210.datagrupa.lv
80.90.0.213	PTR	ip0-213.datagrupa.lv
80.90.0.215	PTR	ip0-215.datagrupa.lv
80.90.0.227	PTR	ip0-227.datagrupa.lv