Robtex

Up: 192.23.172.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.23.173.0/25
Down right: 192.23.173.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.23.173.2	A+PTR	bjcacd-173-2.slb.com
192.23.173.9	A+PTR	bjcacd-173-9.slb.com
192.23.173.23	A+PTR	bjcacd-173-23.slb.com
192.23.173.44	A+PTR	bjcacd-173-44.slb.com
192.23.173.56	A+PTR	bjcacd-173-56.slb.com
192.23.173.60	A+PTR	bjcacd-173-60.slb.com
192.23.173.81	A+PTR	bjcacd-173-81.slb.com
192.23.173.91	A+PTR	bjcacd-173-91.slb.com
192.23.173.94	A+PTR	bjcacd-173-94.slb.com
192.23.173.110	A+PTR	bjcacd-173-110.slb.com
192.23.173.122	A+PTR	bjcacd-173-122.slb.com
192.23.173.122	A	www.v-pob.com
192.23.173.122	A	www.v-pob.co.uk
192.23.173.125	PTR	bjcacd-173-125.slb.com
192.23.173.125	A	test.v-pob.com
192.23.173.131	A+PTR	bjcacd-173-131.slb.com
192.23.173.134	A+PTR	bjcacd-173-134.slb.com
192.23.173.155	A+PTR	bjcacd-173-155.slb.com
192.23.173.162	A+PTR	bjcacd-173-162.slb.com
192.23.173.165	A+PTR	bjcacd-173-165.slb.com
192.23.173.167	A+PTR	bjcacd-173-167.slb.com
192.23.173.188	A+PTR	bjcacd-173-188.slb.com
192.23.173.189	A+PTR	bjcacd-173-189.slb.com
192.23.173.192	A+PTR	bjcacd-173-192.slb.com
192.23.173.204	A+PTR	bjcacd-173-204.slb.com
192.23.173.206	A+PTR	bjcacd-173-206.slb.com
192.23.173.216	PTR	bjcacd-173-216.slb.com
192.23.173.218	A+PTR	bjcacd-173-218.slb.com
192.23.173.221	A+PTR	bjcacd-173-221.slb.com
192.23.173.224	A+PTR	bjcacd-173-224.slb.com
192.23.173.229	A+PTR	bjcacd-173-229.slb.com
192.23.173.232	A+PTR	bjcacd-173-232.slb.com
192.23.173.234	A+PTR	bjcacd-173-234.slb.com
192.23.173.236	A+PTR	bjcacd-173-236.slb.com
192.23.173.246	A+PTR	bjcacd-173-246.slb.com
192.23.173.253	A+PTR	bjcacd-173-253.slb.com