Robtex

Up: 207.172.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 207.172.128.0/20
Down right: 207.172.144.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
207.172.128.1	A+PTR	207-172-128-1.c3-0.161-ubr1.lnh-161.md.cable.rcn.com
207.172.128.1	PTR	bdl1.161-cbr1.lnh-161.md.cable.rcn.net
207.172.128.240	A	207-172-128-240.c3-0.161-ubr1.lnh-161.md.cable.rcn.com
207.172.129.176	A+PTR	207-172-129-176.s8622.c3-0.161-cbr1.lnh-161.md.cable.rcncustomer.com
207.172.130.1	PTR	bdl1.arl-ubr1.sbo-arl.ma.cable.rcn.net
207.172.130.1	A+PTR	207-172-130-1.s8703.c3-0.161-cbr1.lnh-161.md.cable.rcncustomer.com
207.172.130.191	A	loafdog.org
207.172.131.255	PTR	207-172-131-255.s9213.c3-0.161-cbr1.lnh-161.md.cable.rcncustomer.com
207.172.132.1	A+PTR	207-172-132-1.s7137.c3-0.grg-cbr1.lnh-grg.md.cable.rcncustomer.com
207.172.132.1	PTR	bdl1.grg-cbr1.lnh-grg.md.cable.rcn.net
207.172.132.214	A	bmailrt03.raamanagement.com
207.172.133.144	A+PTR	207-172-133-144.c3-0.grg-ubr1.lnh-grg.md.cable.rcn.com
207.172.134.175	A+PTR	207-172-134-175.c3-0.grg-ubr1.lnh-grg.md.cable.rcn.com
207.172.140.160	A	hankeskin.com
207.172.148.1	PTR	bdl1.slvr-ubr1.lnh-slvr.md.cable.rcn.net
207.172.150.1	PTR	bdl1.bth-ubr1.lnh-bth.md.cable.rcn.net
207.172.150.86	A	www.dclacrosse.com
207.172.150.86	A	dclacrosse.com
207.172.151.21	PTR	static.rcncustomer.com
207.172.152.1	A+PTR	aljazamerica02.a.subnet.rcn.com
207.172.152.5	A+PTR	aljazamerica06.a.subnet.rcn.com
207.172.155.89	A	bdl1.129-cbr1.lnh-129.md.cable.rcn.net
207.172.155.145	A	bdl1.129-cbr1.lnh-129.md.cable.rcn.net
207.172.155.153	A	bdl1.129-cbr1.lnh-129.md.cable.rcn.net
207.172.156.71	A+PTR	console9.lnh.md.rcn.net
207.172.156.132	A+PTR	gwyn.tux.org
207.172.156.132	A	dclug.tux.org
207.172.156.132	A	yhslug.tux.org
207.172.156.164	A+PTR	dns03.lnh.md.dns.rcn.net
207.172.156.164	A	hellboy.dns.rcn.net
207.172.156.165	A	corky.dns.rcn.net
207.172.156.165	A	dns04.lnh.md.dns.rcn.net
207.172.156.198	A	usertools.rcn.com
207.172.157.21	A	mr01.lnh.mail.rcn.net
207.172.157.22	A	mr02.mrf.mail.rcn.net
207.172.157.26	A	mr06.mrf.mail.rcn.net
207.172.157.40	A	hm.mail.rcn.net
207.172.157.50	A	mx.lnh.mail.rcn.net
207.172.157.50	A	mx.mail.rcn.net
207.172.157.50	A	mx.mrf.mail.rcn.net
207.172.157.88	A	ms08.lnh.mail.rcn.net
207.172.157.100	A	smtp.mrf.mail.rcn.net
207.172.157.100	A	smtp.lnh.mail.rcn.net
207.172.157.100	A	smtp.ultra.net
207.172.157.102	A	smtp02.lnh.mail.rcn.net
207.172.157.130	A+PTR	web.lnh.mail.rcn.net
207.172.157.130	A	rcn.nyc
207.172.157.130	A	myrcn.com
207.172.157.171	A	spool.mail.rcn.net
207.172.157.181	A	spool.mail.rcn.net
207.172.157.181	A	etrn.mail.rcn.net
207.172.157.181	A	spool.lnh.mail.rcn.net
207.172.157.200	A	virtual.mail.rcn.net
207.172.157.200	A	vmail.mail.rcn.net
207.172.157.200	A	mail1.brainstorm.com
207.172.157.235	A	lists.rcn.net
207.172.159.5	A+PTR	myrcn-staging.rcn.com
207.172.159.21	A	lnwm02.corp.rcn.net
207.172.159.24	A	esearch.rcn.com
207.172.159.28	A	mx1.lnh.corp.rcn.net
207.172.159.36	A+PTR	selfcare.rcn.com
207.172.159.43	A	oma1.corp.rcn.net
207.172.159.53	A	xsoft.corp.rcn.net
207.172.159.62	A	sql2.data.rcn.net
207.172.159.74	A	admintools.dev.rcn.net
207.172.159.132	A	commops.rcn.net
207.172.159.132	A	ops1.noc.rcn.net
207.172.159.134	A	ops3.noc.rcn.net
207.172.159.136	A	ops5.noc.rcn.net
207.172.159.163	PTR	cache.google.com
207.172.159.203	A	xml1.lnh.md.isd.rcn.net
207.172.159.209	A	isd.rcn.net