Robtex

Up: 208.85.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 208.85.16.0/23
Down right: 208.85.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.85.16.2	PTR	mail.upperdarby.org
208.85.16.3	PTR	mail.upperdarby.org
208.85.16.4	PTR	mail.upperdarby.org
208.85.16.5	PTR	mail.upperdarby.org
208.85.16.6	PTR	mail.upperdarby.org
208.85.16.115	A	us-phil.cdn.ielo.net
208.85.16.190	PTR	static.razorinc.net
208.85.16.213	PTR	static.razorinc.net
208.85.16.242	PTR	static-assigned-vps.razorservers.com
208.85.17.4	PTR	gilmoresrestaurant.com
208.85.17.4	PTR	razorexperience.com
208.85.17.4	PTR	mail.gilmoresrestaurant.com
208.85.17.13	PTR	ns1648.ztomy.com
208.85.17.29	PTR	ns1648.ztomy.com
208.85.17.30	PTR	ns1648.ztomy.com
208.85.17.95	PTR	ns1648.ztomy.com
208.85.17.143	PTR	ns1648.ztomy.com
208.85.17.145	PTR	ns1648.ztomy.com
208.85.17.146	A	phonerepairtoday.com
208.85.17.174	PTR	ns1648.ztomy.com
208.85.17.203	PTR	ns1648.ztomy.com
208.85.17.212	PTR	ns1648.ztomy.com
208.85.17.222	PTR	ns1648.ztomy.com
208.85.17.227	PTR	ns1648.ztomy.com
208.85.17.255	PTR	ns1648.ztomy.com
208.85.18.4	PTR	static.razorinc.net
208.85.18.18	PTR	static.razorinc.net
208.85.18.23	PTR	static.razorinc.net
208.85.18.196	A	dotclear.networkcities.net
208.85.19.2	PTR	ns1648.ztomy.com
208.85.19.3	PTR	ns1648.ztomy.com
208.85.19.5	PTR	ns1648.ztomy.com
208.85.19.7	PTR	ns1648.ztomy.com
208.85.19.8	PTR	ns1648.ztomy.com
208.85.19.14	PTR	strideml.st-augustineintl-comm.net
208.85.19.16	PTR	ns1648.ztomy.com
208.85.19.22	PTR	ns1648.ztomy.com
208.85.19.23	PTR	ns1648.ztomy.com
208.85.19.28	PTR	ns1648.ztomy.com
208.85.19.29	PTR	static.razorinc.net
208.85.19.30	PTR	ns1648.ztomy.com
208.85.19.36	PTR	ns1648.ztomy.com
208.85.19.37	PTR	ns1648.ztomy.com
208.85.19.41	PTR	static.razorinc.net
208.85.19.47	PTR	static.razorinc.net
208.85.19.56	PTR	static.razorinc.net
208.85.19.58	PTR	ns1648.ztomy.com
208.85.19.61	PTR	ns1648.ztomy.com
208.85.19.63	PTR	ns1648.ztomy.com
208.85.19.72	PTR	ns1648.ztomy.com
208.85.19.73	PTR	ns1648.ztomy.com
208.85.19.75	PTR	ip-208-85-19-75.razorservers.com
208.85.19.90	PTR	ns1648.ztomy.com
208.85.19.93	PTR	ns1648.ztomy.com
208.85.19.102	PTR	ns1648.ztomy.com
208.85.19.105	PTR	ip-208-85-19-105.razorservers.com
208.85.19.106	PTR	ns1648.ztomy.com
208.85.19.107	PTR	ip-208-85-19-107.razorservers.com
208.85.19.116	PTR	ns1648.ztomy.com
208.85.19.125	PTR	ip-208-85-19-125.razorservers.com
208.85.19.126	PTR	ns1648.ztomy.com
208.85.19.129	PTR	ip-208-85-19-129.razorservers.com
208.85.19.130	PTR	ns1648.ztomy.com
208.85.19.135	PTR	ns1648.ztomy.com
208.85.19.136	PTR	ns1648.ztomy.com
208.85.19.140	PTR	ns1648.ztomy.com
208.85.19.143	PTR	ns1648.ztomy.com
208.85.19.155	PTR	ns1648.ztomy.com
208.85.19.158	PTR	ns1648.ztomy.com
208.85.19.167	PTR	ns1648.ztomy.com
208.85.19.172	PTR	ns1648.ztomy.com
208.85.19.182	PTR	ip-208-85-19-182.razorservers.com
208.85.19.185	PTR	ip-208-85-19-185.razorservers.com
208.85.19.195	PTR	ip-208-85-19-195.razorservers.com
208.85.19.197	PTR	ns1648.ztomy.com
208.85.19.198	PTR	ns1648.ztomy.com
208.85.19.199	PTR	ns1648.ztomy.com
208.85.19.206	PTR	ns1648.ztomy.com
208.85.19.207	PTR	ns1648.ztomy.com
208.85.19.210	PTR	ns1648.ztomy.com
208.85.19.212	PTR	ip-208-85-19-212.razorservers.com
208.85.19.215	PTR	ns1648.ztomy.com
208.85.19.217	PTR	ip-208-85-19-217.razorservers.com
208.85.19.221	PTR	ip-208-85-19-221.razorservers.com
208.85.19.224	PTR	ns1648.ztomy.com
208.85.19.227	PTR	ns1648.ztomy.com
208.85.19.229	PTR	ip-208-85-19-229.razorservers.com
208.85.19.235	PTR	ip-208-85-19-235.razorservers.com
208.85.19.240	PTR	ns1648.ztomy.com
208.85.19.243	PTR	ns1648.ztomy.com
208.85.19.246	PTR	ns1648.ztomy.com
208.85.19.254	PTR	ip-208-85-19-254.razorservers.com