Robtex

Up: 24.31.64.0/18
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Down left: 24.31.64.0/20
Down right: 24.31.80.0/20

IP	Type	Hostname
24.31.64.0	PTR	mta-24-31-64-0.wi.res.rr.com
24.31.65.3	PTR	mta-24-31-65-3.wi.res.rr.com
24.31.66.194	PTR	mta-24-31-66-194.wi.rr.com
24.31.71.35	PTR	mta-24-31-71-35.wi.rr.com
24.31.71.97	PTR	mta-24-31-71-97.wi.rr.com
24.31.72.97	PTR	mta-24-31-72-97.wi.rr.com
24.31.72.130	PTR	mta-24-31-72-130.wi.rr.com
24.31.83.130	PTR	mta-24-31-83-130.wi.rr.com
24.31.90.225	PTR	mta-24-31-90-225.wi.rr.com