Robtex

Up: 72.135.64.0/19
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Down left: 72.135.64.0/21
Down right: 72.135.72.0/21

IP	Type	Hostname
72.135.67.65	PTR	mta-72-135-67-65.kc.rr.com
72.135.67.147	PTR	mta-72-135-67-147.kc.rr.com
72.135.67.160	PTR	mta-72-135-67-160.kc.rr.com
72.135.67.193	PTR	mta-72-135-67-193.kc.rr.com
72.135.68.82	PTR	mta-72-135-68-82.kc.rr.com
72.135.69.144	PTR	mta-72-135-69-144.kc.rr.com
72.135.69.145	PTR	mta-72-135-69-145.kc.rr.com
72.135.70.19	PTR	mta-72-135-70-19.kc.rr.com
72.135.70.49	PTR	mta-72-135-70-49.kc.rr.com
72.135.70.51	PTR	mta-72-135-70-51.wi.res.rr.com
72.135.70.112	PTR	mta-72-135-70-112.kc.rr.com
72.135.70.144	PTR	mta-72-135-70-144.kc.rr.com
72.135.70.209	PTR	mta-72-135-70-209.kc.rr.com
72.135.70.211	PTR	mta-72-135-70-211.kc.rr.com
72.135.71.99	PTR	mta-72-135-71-99.kc.rr.com
72.135.71.161	PTR	mta-72-135-71-161.kc.rr.com
72.135.71.193	PTR	mta-72-135-71-193.kc.rr.com
72.135.72.0	PTR	mta-72-135-72-0.kc.rr.com
72.135.72.1	PTR	mta-72-135-72-1.kc.rr.com
72.135.72.2	PTR	mta-72-135-72-2.kc.rr.com
72.135.72.162	PTR	mta-72-135-72-162.kc.rr.com
72.135.72.179	PTR	mta-72-135-72-179.kc.rr.com
72.135.73.2	PTR	mta-72-135-73-2.kc.rr.com
72.135.73.99	PTR	mta-72-135-73-99.kc.rr.com
72.135.73.162	PTR	mta-72-135-73-162.kc.rr.com
72.135.76.146	PTR	mta-72-135-76-146.kc.rr.com
72.135.76.178	PTR	mta-72-135-76-178.kc.rr.com
72.135.76.210	PTR	mta-72-135-76-210.kc.rr.com
72.135.76.227	PTR	mta-72-135-76-227.kc.rr.com
72.135.78.0	PTR	mta-72-135-78-0.kc.rr.com
72.135.78.33	PTR	mta-72-135-78-33.kc.rr.com
72.135.78.35	PTR	mta-72-135-78-35.kc.rr.com
72.135.78.64	PTR	mta-72-135-78-64.kc.rr.com
72.135.78.147	PTR	mta-72-135-78-147.kc.rr.com
72.135.78.225	PTR	mta-72-135-78-225.kc.rr.com
72.135.79.35	PTR	mta-72-135-79-35.kc.rr.com
72.135.79.145	PTR	mta-72-135-79-145.kc.rr.com
72.135.79.162	PTR	mta-72-135-79-162.kc.rr.com