Robtex

Up: 205.189.88.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 205.189.92.0/23
Down right: 205.189.94.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
205.189.92.70	A+PTR	qa-ioe-1-h.route1.com
205.189.92.78	A+PTR	qa-notifier-1-a.route1.com
205.189.92.121	A+PTR	qa-ioe-v-r.route1.com
205.189.92.121	A+PTR	r-ioe-vip.z01.mobinet.qa.route1.com
205.189.92.123	A+PTR	qa-registration-v-s.route1.com
205.189.92.140	A	qa-mnm-1-a.route1.com
205.189.92.141	A	qa-mnm-1-b.route1.com
205.189.92.145	A+PTR	qa-sfm-2-b.route1.com
205.189.92.156	A+PTR	qa-map-1.route1.com
205.189.92.156	A+PTR	qa-map-edge01.route1.com
205.189.92.158	A	qa-mnm-1-a.route1.com
205.189.92.159	A+PTR	qa-mnm-1-b.route1.com
205.189.92.171	A+PTR	mag02-msa.route1.com
205.189.93.27	A	prod-proxyssl-2-a.route1.net
205.189.93.30	A	prod-proxyssl-3-b.route1.net
205.189.93.33	A	prod-msa-01-1-a.route1.net
205.189.93.37	A	prod-msa-01-3-a.route1.net
205.189.93.51	PTR	r-ioe.z01.mobinet.route1.net
205.189.93.53	A	pw-cs.z01.mobinet.route1.net
205.189.93.54	A+PTR	registry.z01.mobinet.route1.net
205.189.93.57	A+PTR	portal.route1.com
205.189.93.58	PTR	map.route1.net
205.189.93.58	PTR	crl.z01.mobinet.route1.net
205.189.93.58	PTR	map.z01.mobinet.route1.net
205.189.93.70	A	prod-msg-01-a.route1.net
205.189.93.75	A+PTR	prod-pw-cs.route1.net
205.189.93.75	A+PTR	pw-cs.z01.mobinet.route1.net
205.189.93.160	A+PTR	mobiupdate.route1.net
205.189.93.160	A+PTR	ftp-mobinet.route1.com
205.189.93.240	A+PTR	mail03.route1.com
205.189.93.245	PTR	barracuda.route1.com
205.189.93.245	A+PTR	mail.route1.net
205.189.93.245	A	mail01.route1.com