Robtex

Up: 67.228.254.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 67.228.255.0/25
Down right: 67.228.255.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
67.228.255.0	A+PTR	0.ff.e443.ip4.static.sl-reverse.com
67.228.255.0	A	67.228.255.0-static.reverse.softlayer.com
67.228.255.4	PTR	4.ff.e443.ip4.static.sl-reverse.com
67.228.255.4	A	ns2.moneymakingbusinesswebsites.com
67.228.255.4	A	ns2.basic.se
67.228.255.5	PTR	5.ff.e443.ip4.static.sl-reverse.com
67.228.255.5	A	ns2.financingfactory.com
67.228.255.5	A	ns3.mgmcomp.net
67.228.255.6	A	67.228.255.6-static.reverse.softlayer.com
67.228.255.17	A+PTR	67.228.255.17-static.reverse.softlayer.com
67.228.255.20	PTR	14.ff.e443.ip4.static.sl-reverse.com
67.228.255.20	A	ns2.arpa.global-datacenter.com
67.228.255.20	A	67.228.255.20-static.reverse.softlayer.com
67.228.255.22	PTR	16.ff.e443.ip4.static.sl-reverse.com
67.228.255.22	A	ns2.networklayer.com
67.228.255.23	A	67.228.255.23-static.reverse.softlayer.com
67.228.255.24	A	67.228.255.24-static.reverse.softlayer.com
67.228.255.25	PTR	19.ff.e443.ip4.static.sl-reverse.com
67.228.255.25	A	ns2.softlayer.net
67.228.255.26	PTR	1a.ff.e443.ip4.static.sl-reverse.com
67.228.255.26	A	67.228.255.26-static.reverse.softlayer.com
67.228.255.26	A	ns4.arpa.networklayer.com
67.228.255.27	A	67.228.255.27-static.reverse.softlayer.com
67.228.255.28	A	67.228.255.28-static.reverse.softlayer.com
67.228.255.29	A	67.228.255.29-static.reverse.softlayer.com
67.228.255.31	A	67.228.255.31-static.reverse.softlayer.com
67.228.255.35	A+PTR	67.228.255.35-static.reverse.softlayer.com
67.228.255.36	PTR	67.228.255.36-static.reverse.softlayer.com
67.228.255.39	A	67.228.255.39-static.reverse.softlayer.com
67.228.255.40	A	67.228.255.40-static.reverse.softlayer.com
67.228.255.43	A+PTR	67.228.255.43-static.reverse.softlayer.com
67.228.255.44	PTR	2c.ff.e443.ip4.static.sl-reverse.com
67.228.255.44	A	67.228.255.44-static.reverse.softlayer.com
67.228.255.46	A	67.228.255.46-static.reverse.softlayer.com
67.228.255.53	A	67.228.255.53-static.reverse.softlayer.com
67.228.255.55	A	67.228.255.55-static.reverse.softlayer.com
67.228.255.57	A	67.228.255.57-static.reverse.softlayer.com
67.228.255.58	A	67.228.255.58-static.reverse.softlayer.com
67.228.255.67	A	67.228.255.67-static.reverse.softlayer.com
67.228.255.68	A	67.228.255.68-static.reverse.softlayer.com
67.228.255.102	A	67.228.255.102-static.reverse.softlayer.com
67.228.255.105	PTR	67.228.255.105-static.reverse.softlayer.com
67.228.255.109	A	67.228.255.109-static.reverse.softlayer.com
67.228.255.114	PTR	72.ff.e443.ip4.static.sl-reverse.com
67.228.255.114	A	67.228.255.114-static.reverse.softlayer.com
67.228.255.129	A+PTR	81.ff.e443.ip4.static.sl-reverse.com
67.228.255.129	A	67.228.255.129-static.reverse.softlayer.com
67.228.255.136	A+PTR	88.ff.e443.ip4.static.sl-reverse.com
67.228.255.136	A	67.228.255.136-static.reverse.softlayer.com
67.228.255.152	A+PTR	98.ff.e443.ip4.static.sl-reverse.com
67.228.255.152	A	67.228.255.152-static.reverse.softlayer.com
67.228.255.163	A+PTR	a3.ff.e443.ip4.static.sl-reverse.com
67.228.255.163	A	67.228.255.163-static.reverse.softlayer.com
67.228.255.172	PTR	ac.ff.e443.ip4.static.sl-reverse.com
67.228.255.180	A+PTR	b4.ff.e443.ip4.static.sl-reverse.com
67.228.255.180	A	67.228.255.180-static.reverse.softlayer.com
67.228.255.193	PTR	c1.ff.e443.ip4.static.sl-reverse.com
67.228.255.193	A	s3.eu-geo.objectstorage.softlayer.net
67.228.255.249	PTR	f9.ff.e443.ip4.static.sl-reverse.com
67.228.255.254	A+PTR	fe.ff.e443.ip4.static.sl-reverse.com
67.228.255.254	A	67.228.255.254-static.reverse.softlayer.com
67.228.255.255	A+PTR	ff.ff.e443.ip4.static.sl-reverse.com