Robtex

Up: 173.0.224.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 173.0.240.0/21
Down right: 173.0.248.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.0.240.0	PTR	fixedwireless-173-0-240-0.dynamic.netwurx.net
173.0.240.17	PTR	fixedwireless-173-0-240-17.dynamic.netwurx.net
173.0.240.18	PTR	fixedwireless-173-0-240-18.dynamic.netwurx.net
173.0.240.65	A	ether2-hrt5-car1.netwurx.net
173.0.240.144	PTR	fixedwireless-173-0-240-144.dynamic.netwurx.net
173.0.240.231	A	askwit.com
173.0.243.1	A+PTR	v417-ge0-wht2-rtr1.netwurx.net
173.0.243.80	PTR	fixedwireless-173-0-243-80.dynamic.netwurx.net
173.0.243.82	PTR	fixedwireless-173-0-243-82.dynamic.netwurx.net
173.0.243.129	PTR	ip-173-0-243-129.dynamic.netwurx.net
173.0.246.1	PTR	fixedwireless-173-0-246-1.dynamic.netwurx.net
173.0.246.34	PTR	fixedwireless-173-0-246-34.dynamic.netwurx.net
173.0.246.51	PTR	fixedwireless-173-0-246-51.dynamic.netwurx.net
173.0.246.65	PTR	fixedwireless-173-0-246-65.dynamic.netwurx.net
173.0.246.82	PTR	fixedwireless-173-0-246-82.dynamic.netwurx.net
173.0.246.96	PTR	fixedwireless-173-0-246-96.dynamic.netwurx.net
173.0.246.97	PTR	fixedwireless-173-0-246-97.dynamic.netwurx.net
173.0.246.98	PTR	fixedwireless-173-0-246-98.dynamic.netwurx.net
173.0.246.112	PTR	fixedwireless-173-0-246-112.dynamic.netwurx.net
173.0.246.114	PTR	fixedwireless-173-0-246-114.dynamic.netwurx.net
173.0.246.128	PTR	fixedwireless-173-0-246-128.dynamic.netwurx.net
173.0.246.147	PTR	fixedwireless-173-0-246-147.dynamic.netwurx.net
173.0.246.161	PTR	fixedwireless-173-0-246-161.dynamic.netwurx.net
173.0.246.162	PTR	fixedwireless-173-0-246-162.dynamic.netwurx.net
173.0.246.163	PTR	fixedwireless-173-0-246-163.dynamic.netwurx.net
173.0.246.193	PTR	fixedwireless-173-0-246-193.dynamic.netwurx.net
173.0.246.210	PTR	fixedwireless-173-0-246-210.dynamic.netwurx.net
173.0.246.224	PTR	fixedwireless-173-0-246-224.dynamic.netwurx.net
173.0.246.225	PTR	fixedwireless-173-0-246-225.dynamic.netwurx.net
173.0.246.226	PTR	fixedwireless-173-0-246-226.dynamic.netwurx.net
173.0.246.241	PTR	fixedwireless-173-0-246-241.dynamic.netwurx.net
173.0.246.242	PTR	fixedwireless-173-0-246-242.dynamic.netwurx.net
173.0.250.81	PTR	ip-173-0-250-81.dlknet.net
173.0.250.99	PTR	ip-173-0-250-99.dlknet.net
173.0.250.112	PTR	ip-173-0-250-112.dlknet.net
173.0.250.113	A+PTR	v3-ivcore.dlknet.net
173.0.250.129	PTR	ip-173-0-250-129.dlknet.net
173.0.250.192	PTR	ip-173-0-250-192.dlknet.net
173.0.250.208	PTR	ip-173-0-250-208.dlknet.net
173.0.250.210	PTR	ip-173-0-250-210.dlknet.net
173.0.252.0	PTR	ip-173-0-252-0.dlknet.net
173.0.252.141	A	dlkrentals.com
173.0.252.141	A	dmz-rtr.dlknet.net
173.0.252.141	A	widairysupply.com
173.0.253.1	PTR	ip-173-0-253-1.dlknet.net
173.0.253.16	PTR	ip-173-0-253-16.dlknet.net
173.0.253.17	PTR	ip-173-0-253-17.dlknet.net
173.0.253.49	PTR	ip-173-0-253-49.dlknet.net
173.0.253.51	PTR	ip-173-0-253-51.dlknet.net
173.0.253.64	PTR	ip-173-0-253-64.dlknet.net
173.0.253.65	PTR	ip-173-0-253-65.dlknet.net
173.0.253.81	PTR	ip-173-0-253-81.dlknet.net
173.0.253.97	PTR	ip-173-0-253-97.dlknet.net
173.0.253.98	PTR	ip-173-0-253-98.dlknet.net
173.0.253.113	PTR	ip-173-0-253-113.dlknet.net
173.0.253.130	PTR	ip-173-0-253-130.dlknet.net
173.0.253.131	PTR	ip-173-0-253-131.dlknet.net
173.0.253.144	PTR	ip-173-0-253-144.dlknet.net
173.0.253.145	PTR	ip-173-0-253-145.dlknet.net
173.0.253.160	PTR	ip-173-0-253-160.dlknet.net
173.0.253.162	PTR	ip-173-0-253-162.dlknet.net
173.0.253.192	PTR	ip-173-0-253-192.dlknet.net
173.0.253.193	PTR	ip-173-0-253-193.dlknet.net
173.0.253.210	PTR	ip-173-0-253-210.dlknet.net
173.0.253.211	PTR	ip-173-0-253-211.dlknet.net
173.0.253.225	PTR	ip-173-0-253-225.dlknet.net
173.0.253.227	PTR	ip-173-0-253-227.dlknet.net
173.0.253.243	PTR	ip-173-0-253-243.dlknet.net
173.0.254.10	PTR	ip-173-0-254-10.dlknet.net
173.0.254.96	PTR	ip-173-0-254-96.dlknet.net
173.0.254.226	PTR	ip-173-0-254-226.dlknet.net
173.0.254.229	PTR	ip-173-0-254-229.dlknet.net
173.0.254.238	PTR	ip-173-0-254-238.dlknet.net
173.0.255.9	PTR	ip-173-0-255-9.dlknet.net
173.0.255.16	PTR	ip-173-0-255-16.dlknet.net
173.0.255.126	PTR	ip-173-0-255-126.dlknet.net
173.0.255.229	PTR	ip-173-0-255-229.dlknet.net
173.0.255.255	PTR	ip-173-0-255-255.dlknet.net