Robtex

Up: 204.137.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 204.137.64.0/19
Down right: 204.137.96.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.137.64.1	A+PTR	hydrogen.lps.org
204.137.66.1	A+PTR	dns.lps.org
204.137.66.2	A+PTR	sparc.lps.org
204.137.66.2	A	dns2.lps.org
204.137.66.31	A	web.lps.org
204.137.66.98	A	es1100.lps.org
204.137.66.123	A	es5000.lps.org
204.137.66.123	A	es4000.lps.org
204.137.66.126	A	zmta4.lps.org
204.137.66.126	A	smtp.lps.org
204.137.66.136	A	dlgadmp.lps.org
204.137.66.163	A	ckm.lps.org
204.137.66.164	A	ckm.lps.org
204.137.66.169	A	zmta3.lps.org
204.137.66.169	A	smtp.lps.org
204.137.66.195	PTR	drupaldata.lps.org
204.137.66.195	A	belmont.lps.org
204.137.66.195	A	zoo.lps.org
204.137.71.1	PTR	sith.lps.org
204.137.71.67	PTR	lhs71-67.lps.org
204.137.71.129	PTR	lhs71-129.lps.org
204.137.71.130	PTR	lhs71-130.lps.org
204.137.71.131	PTR	lhs71-131.lps.org
204.137.71.193	PTR	lhs71-193.lps.org
204.137.71.195	PTR	lhs71-195.lps.org
204.137.75.4	PTR	gator4.lps.org
204.137.75.64	PTR	lns75-64.lps.org
204.137.75.65	PTR	lns75-65.lps.org
204.137.75.67	PTR	lns75-67.lps.org
204.137.75.131	PTR	lns75-131.lps.org
204.137.75.192	PTR	lns75-192.lps.org
204.137.75.194	PTR	lns75-194.lps.org
204.137.75.195	PTR	lns75-195.lps.org
204.137.76.1	PTR	lsw1.lps.org
204.137.76.3	PTR	lsw3.lps.org
204.137.76.65	PTR	lsw76-65.lps.org
204.137.76.66	PTR	lsw76-66.lps.org
204.137.76.193	PTR	lsw76-193.lps.org
204.137.81.64	PTR	culws64.lps.org
204.137.81.65	PTR	culws65.lps.org
204.137.81.128	PTR	culws128.lps.org
204.137.100.2	PTR	lps1002.lps.org
204.137.100.5	PTR	lps10005.lps.org