Robtex

Up: 204.15.168.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 204.15.172.0/23
Down right: 204.15.174.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.15.172.0	A+PTR	ip-204-15-172-0.sjc.hootops.com
204.15.172.65	A	re1-ix1.sjc.hootops.com
204.15.172.215	PTR	ip-204-15-172-215.sjc.hootops.com
204.15.172.215	A	dsft.it
204.15.172.215	A	emls.co
204.15.172.228	A+PTR	ip-204-15-172-228.sjc.hootops.com
204.15.172.228	A	sk12.us
204.15.172.228	A	davespr.com
204.15.172.246	PTR	ip-204-15-172-246.sjc.hootops.com
204.15.172.246	A	owl.ly
204.15.172.246	A	onepath.co
204.15.173.254	PTR	ip-204-15-173-254.sjc.hootops.com
204.15.175.6	A+PTR	fw1-bnx1.van.hootops.com
204.15.175.14	A+PTR	ip-204-15-175-14.van.hootops.com
204.15.175.15	A+PTR	ip-204-15-175-15.van.hootops.com
204.15.175.19	A+PTR	ip-204-15-175-19.van.hootops.com
204.15.175.28	A+PTR	ip-204-15-175-28.van.hootops.com
204.15.175.29	A+PTR	ip-204-15-175-29.van.hootops.com
204.15.175.33	A+PTR	ip-204-15-175-33.van.hootops.com
204.15.175.37	A+PTR	re2-vl55.van.hootops.com
204.15.175.43	A+PTR	ip-204-15-175-43.van.hootops.com
204.15.175.51	A+PTR	ip-204-15-175-51.van.hootops.com
204.15.175.58	A+PTR	ip-204-15-175-58.van.hootops.com
204.15.175.72	A+PTR	primus.van.hootops.com
204.15.175.75	PTR	devmgo.van.hootops.com
204.15.175.79	A+PTR	ip-204-15-175-79.van.hootops.com
204.15.175.85	A+PTR	ip-204-15-175-85.van.hootops.com
204.15.175.86	A+PTR	ip-204-15-175-86.van.hootops.com
204.15.175.87	A+PTR	ip-204-15-175-87.van.hootops.com
204.15.175.91	A+PTR	ip-204-15-175-91.van.hootops.com
204.15.175.94	A+PTR	ip-204-15-175-94.van.hootops.com
204.15.175.97	A+PTR	ip-204-15-175-97.van.hootops.com
204.15.175.98	A+PTR	ip-204-15-175-98.van.hootops.com
204.15.175.103	A+PTR	ip-204-15-175-103.van.hootops.com
204.15.175.104	A+PTR	ip-204-15-175-104.van.hootops.com
204.15.175.105	A+PTR	ip-204-15-175-105.van.hootops.com
204.15.175.113	A+PTR	ip-204-15-175-113.van.hootops.com
204.15.175.118	A+PTR	ip-204-15-175-118.van.hootops.com
204.15.175.120	A+PTR	ip-204-15-175-120.van.hootops.com
204.15.175.127	A+PTR	ip-204-15-175-127.van.hootops.com
204.15.175.132	A+PTR	ip-204-15-175-132.van.hootops.com
204.15.175.136	A+PTR	ip-204-15-175-136.van.hootops.com
204.15.175.141	A+PTR	ip-204-15-175-141.van.hootops.com
204.15.175.143	A+PTR	ip-204-15-175-143.van.hootops.com
204.15.175.148	A+PTR	ip-204-15-175-148.van.hootops.com
204.15.175.151	A+PTR	ip-204-15-175-151.van.hootops.com
204.15.175.152	A+PTR	ip-204-15-175-152.van.hootops.com
204.15.175.153	A+PTR	ip-204-15-175-153.van.hootops.com
204.15.175.156	A+PTR	ip-204-15-175-156.van.hootops.com
204.15.175.161	A+PTR	ip-204-15-175-161.van.hootops.com
204.15.175.162	A+PTR	ip-204-15-175-162.van.hootops.com
204.15.175.166	PTR	ip-205-15-174-166.sjc.hootops.com
204.15.175.175	A+PTR	ip-204-15-175-175.van.hootops.com
204.15.175.177	A+PTR	ip-204-15-175-177.van.hootops.com
204.15.175.182	A+PTR	ip-204-15-175-182.van.hootops.com
204.15.175.184	A+PTR	ip-204-15-175-184.van.hootops.com
204.15.175.185	A+PTR	ip-204-15-175-185.van.hootops.com
204.15.175.186	A+PTR	ip-204-15-175-186.van.hootops.com
204.15.175.189	A+PTR	ip-204-15-175-189.van.hootops.com
204.15.175.191	A+PTR	ip-204-15-175-191.van.hootops.com
204.15.175.198	A+PTR	ip-204-15-175-198.van.hootops.com
204.15.175.203	A+PTR	ip-204-15-175-203.van.hootops.com
204.15.175.218	A+PTR	ip-204-15-175-218.van.hootops.com
204.15.175.219	A+PTR	ip-204-15-175-219.van.hootops.com
204.15.175.225	A+PTR	ip-204-15-175-225.van.hootops.com
204.15.175.231	A+PTR	ip-204-15-175-231.van.hootops.com
204.15.175.233	A+PTR	ip-204-15-175-233.van.hootops.com
204.15.175.236	A+PTR	ip-204-15-175-236.van.hootops.com
204.15.175.254	A+PTR	ip-204-15-175-254.van.hootops.com