Robtex

Up: 1.2.0.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 1.2.1.0/25
Down right: 1.2.1.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
1.2.1.0	A	112.170-static.reverse.softlayer.com
1.2.1.0	A	172.170-static.reverse.softlayer.com
1.2.1.0	A	112.150-static.reverse.softlayer.com
1.2.1.1	A	182.131-static.reverse.softlayer.com
1.2.1.1	A	122.181-static.reverse.softlayer.com
1.2.1.1	A	636699.com
1.2.1.2	A	pop.mijn.com
1.2.1.2	A	pop.kpntelekom.org
1.2.1.2	A	fh2007.com.cn
1.2.1.3	A	112.133-static.reverse.softlayer.com
1.2.1.3	A	112.113-static.reverse.softlayer.com
1.2.1.3	A	122.143-static.reverse.softlayer.com
1.2.1.4	A	112.144-static.reverse.softlayer.com
1.2.1.4	A	102.124-static.reverse.softlayer.com
1.2.1.4	A	152.124-static.reverse.softlayer.com
1.2.1.5	A	182.175-static.reverse.softlayer.com
1.2.1.5	A	192.125-static.reverse.softlayer.com
1.2.1.5	A	152.155-static.reverse.softlayer.com
1.2.1.6	A	192.186-static.reverse.softlayer.com
1.2.1.6	A	112.126-static.reverse.softlayer.com
1.2.1.6	A	192.136-static.reverse.softlayer.com
1.2.1.7	A	162.187-static.reverse.softlayer.com
1.2.1.7	A	182.167-static.reverse.softlayer.com
1.2.1.7	A	192.177-static.reverse.softlayer.com
1.2.1.8	A	152.188-static.reverse.softlayer.com
1.2.1.8	A	102.128-static.reverse.softlayer.com
1.2.1.8	A	152.178-static.reverse.softlayer.com
1.2.1.9	A	162.189-static.reverse.softlayer.com
1.2.1.9	A	142.149-static.reverse.softlayer.com
1.2.1.9	A	192.109-static.reverse.softlayer.com
1.2.1.18	A	shimpo17.cn
1.2.1.41	A	192.1.41-static.reverse.softlayer.com
1.2.1.81	A	1.201.81-static.reverse.softlayer.com
1.2.1.99	A	172.1.99-static.reverse.softlayer.com