Robtex

Up: 64.72.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 64.72.0.0/20
Down right: 64.72.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.72.0.20	PTR	dns1.nhti.edu
64.72.0.20	A	dns.nhti.edu
64.72.0.77	A	nhti.nhti.edu
64.72.0.195	PTR	nhti0-195.nhti.edu
64.72.0.224	PTR	nhti0-224.nhti.edu
64.72.3.2	PTR	nhti3-2.nhti.edu
64.72.5.4	PTR	nhctcs-5-4.manc.nhctc.edu
64.72.5.161	PTR	nhctcs-5-161.manc.nhctc.edu
64.72.5.227	PTR	nhctcs-5-227.manc.nhctc.edu
64.72.8.2	PTR	nhctcs-8-2.berl.nhctc.edu
64.72.14.67	A	remote.alexandde.com
64.72.19.67	PTR	nhctcs-19-67.nash.nhctc.edu
64.72.19.227	PTR	nhctcs-19-227.berl.nhctc.edu
64.72.21.34	PTR	nhctcs-21-34.stra.nhctc.edu
64.72.21.65	PTR	nhctcs-21-65.stra.nhctc.edu
64.72.21.193	PTR	nhctcs-21-193.laco.nhctc.edu
64.72.22.195	PTR	nhctcs-22-195.laco.nhctc.edu
64.72.24.32	PTR	nhctcs-24-32.stra.nhctc.edu
64.72.24.193	PTR	nhctcs-24-193.laco.nhctc.edu
64.72.24.227	PTR	nhctcs-24-227.laco.nhctc.edu
64.72.26.29	A	nhtiquery.nhti.edu
64.72.27.38	A	ntp.ccsnh.edu
64.72.27.39	A	students.ccsnh.edu
64.72.28.88	A	pban.ccsnh.edu
64.72.28.100	A+PTR	ns1.ccsnh.edu
64.72.28.101	A+PTR	ns2.ccsnh.edu
64.72.28.107	A	dmzweb.ccsnh.edu
64.72.28.112	A	barracuda.ccsnh.edu
64.72.29.26	A	cas.tec.nh.us
64.72.29.26	A	cas.ccsnh.edu
64.72.29.26	A	exclh1.tec.nh.us
64.72.29.134	A+PTR	ftmg.ccsnh.edu
64.72.29.134	PTR	legacy.ccsnh.edu
64.72.29.134	PTR	owa1.ccsnh.edu
64.72.29.136	PTR	sysnet2.ccsnh.edu
64.72.29.136	PTR	sysnet2phpma.ccsnh.edu
64.72.29.160	PTR	students.ccsnh.edu
64.72.29.160	PTR	portal.students.ccsnh.edu
64.72.29.161	A+PTR	itsupport.ccsnh.edu
64.72.29.176	A	test.sis.rivervalley.edu
64.72.29.193	A+PTR	sis.mccnh.edu
64.72.29.194	A	sis.greatbay.edu
64.72.29.196	A+PTR	sis.rivervalley.edu
64.72.29.236	A	ezproxy.lrcc.edu