Robtex

Up: 12.129.10.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 12.129.10.128/26
Down right: 12.129.10.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
12.129.10.128	PTR	avanade.com
12.129.10.129	PTR	avanade.com
12.129.10.133	PTR	avanade.com
12.129.10.134	PTR	avanade.com
12.129.10.135	PTR	avanade.com
12.129.10.135	A+PTR	media.amer.avanade.com
12.129.10.136	PTR	avanade.com
12.129.10.139	PTR	avanade.com
12.129.10.139	PTR	www.therealityexchange.co.uk
12.129.10.139	PTR	www.cloudtalent.avanade.com
12.129.10.142	PTR	avanade.com
12.129.10.142	PTR	author-redesign.avanade.com
12.129.10.142	PTR	author-redesignstaging.avanade.com
12.129.10.143	PTR	avanade.com
12.129.10.143	A	defendpoint.avanade.com
12.129.10.144	PTR	avanade.com
12.129.10.145	PTR	avanade.com
12.129.10.146	PTR	avanade.com
12.129.10.146	PTR	at-its.avanade.com
12.129.10.148	PTR	avanade.com
12.129.10.150	PTR	avanade.com
12.129.10.153	PTR	avanade.com
12.129.10.157	PTR	avanade.com
12.129.10.158	PTR	avanade.com
12.129.10.161	PTR	avanade.com
12.129.10.163	PTR	avanade.com
12.129.10.163	A+PTR	seaaccess.avanade.com
12.129.10.163	A	ocs.avanade.com
12.129.10.164	PTR	avanade.com
12.129.10.164	A+PTR	seawebconf.avanade.com
12.129.10.165	PTR	avanade.com
12.129.10.165	A+PTR	seaav.avanade.com
12.129.10.166	PTR	avanade.com
12.129.10.166	A+PTR	seaaccess.avanade.com
12.129.10.166	A	ocs.avanade.com
12.129.10.167	PTR	avanade.com
12.129.10.167	A+PTR	seawebconf.avanade.com
12.129.10.168	A	seaav.avanade.com
12.129.10.169	PTR	avanade.com
12.129.10.169	A+PTR	seaaccess.avanade.com
12.129.10.169	A	ocs.avanade.com
12.129.10.170	PTR	avanade.com
12.129.10.170	A+PTR	seawebconf.avanade.com
12.129.10.171	PTR	avanade.com
12.129.10.171	A+PTR	seaav.avanade.com
12.129.10.172	PTR	avanade.com
12.129.10.172	A	lyncdiscover.avanade.com
12.129.10.172	A	seawebextfe.avanade.com
12.129.10.187	PTR	avanade.com
12.129.10.189	PTR	avanade.com
12.129.10.192	PTR	avanade.com
12.129.10.194	PTR	avanade.com
12.129.10.196	PTR	avanade.com
12.129.10.200	PTR	avanade.com
12.129.10.201	A	sea-lync15-web.avanade.com
12.129.10.202	PTR	avanade.com
12.129.10.205	PTR	sea-lync-web.avanade.com.avanade.com
12.129.10.205	A	sea-lync-web.avanade.com
12.129.10.206	PTR	lyncdiscover.avanade.com
12.129.10.206	PTR	sea-lyncdir-web.avanade.com
12.129.10.208	PTR	avanade.com
12.129.10.209	PTR	avanade.com
12.129.10.211	PTR	avanade.com
12.129.10.213	PTR	avanade.com
12.129.10.213	A+PTR	sea-lncfp1-web.avanade.com
12.129.10.213	PTR	seaplncfp1-web.avanade.com
12.129.10.216	PTR	avanade.com
12.129.10.218	PTR	avanade.com
12.129.10.218	PTR	lync15.avanade.com
12.129.10.219	PTR	avanade.com
12.129.10.219	PTR	ocs.avanade.com
12.129.10.219	A+PTR	sea-lncep1.avanade.com
12.129.10.222	PTR	avanade.com
12.129.10.224	PTR	avanade.com
12.129.10.227	PTR	avanade.com
12.129.10.228	PTR	avanade.com
12.129.10.228	A+PTR	author-staging.avanade.com
12.129.10.228	PTR	seaexmsmtp.avanade.com
12.129.10.229	PTR	avanade.com
12.129.10.230	PTR	avanade.com
12.129.10.232	PTR	avanade.com
12.129.10.233	PTR	avanade.com
12.129.10.234	PTR	avanade.com
12.129.10.234	PTR	chat.avanade.com
12.129.10.235	PTR	avanade.com
12.129.10.236	A+PTR	avanade.com
12.129.10.237	PTR	avanade.com
12.129.10.238	PTR	avanade.com
12.129.10.238	A+PTR	pki.avanade.com
12.129.10.239	PTR	avanade.com
12.129.10.239	PTR	peopleapps.avanade.com
12.129.10.241	PTR	avanade.com
12.129.10.241	PTR	idea.avanade.com
12.129.10.241	A+PTR	innovation.avanade.com
12.129.10.242	PTR	avanade.com
12.129.10.243	A	xrm.avanade.com
12.129.10.245	PTR	avanade.com
12.129.10.245	A	at.avanade.com
12.129.10.247	PTR	avanade.com
12.129.10.249	PTR	avanade.com
12.129.10.249	PTR	calendar.avanade.com
12.129.10.249	PTR	connect.avanade.com
12.129.10.250	PTR	avanade.com
12.129.10.250	PTR	peopledev.avanade.com
12.129.10.252	PTR	avanade.com
12.129.10.252	PTR	enterprisereports.avanade.com
12.129.10.253	PTR	avanade.com
12.129.10.253	PTR	ax4health.com
12.129.10.253	PTR	chronicconditionmanagementdelivered.com
12.129.10.254	PTR	avanade.com
12.129.10.254	A	ocsp.avanade.com