Robtex

Up: 216.55.168.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.55.172.0/23
Down right: 216.55.174.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.55.172.1	PTR	core-ge10hsrp2.carrierzone.com
216.55.172.2	PTR	core1-ge10s.carrierzone.com
216.55.172.3	A+PTR	216.55.172.3.ip.verticalresponse.com
216.55.172.12	A+PTR	mkt12-ha.verticalresponse.com
216.55.172.14	A+PTR	mkt14-ha.verticalresponse.com
216.55.172.15	A+PTR	mkt15-ha.verticalresponse.com
216.55.172.16	A+PTR	mkt16-ha.verticalresponse.com
216.55.172.24	A+PTR	mkt24-ha.verticalresponse.com
216.55.172.26	A+PTR	mkt26-ha.verticalresponse.com
216.55.172.27	A+PTR	mkt27-ha.verticalresponse.com
216.55.172.28	A+PTR	mkt28-ha.verticalresponse.com
216.55.172.48	A	loslobos.net
216.55.172.118	A	eldoradohillschamber.org
216.55.172.180	A	amandalindley.com
216.55.172.234	A	www.asiawebplus.com
216.55.172.234	A	mail.asiawebplus.com
216.55.172.234	A	asiawebplus.com
216.55.173.1	PTR	core-ge10hsrp2.carrierzone.com
216.55.173.2	PTR	core1-ge10s.carrierzone.com
216.55.173.3	A+PTR	216.55.173.3.ip.verticalresponse.com
216.55.173.55	A	www.apparel.com.gt
216.55.173.55	A	apparel.com.gt
216.55.173.81	A	ns2.hostulator.com
216.55.173.176	A	flmkidztown.org
216.55.173.210	A	sperianprotection.distributorstimulus.com
216.55.173.210	A	distributorstimulus.com
216.55.173.210	A	mailman.distributorstimulus.com
216.55.174.1	PTR	core-ge10hsrp2.carrierzone.com
216.55.174.2	PTR	core1-ge10s.carrierzone.com
216.55.174.3	PTR	core2-ge10s.carrierzone.com
216.55.174.102	A	cloretazine.org
216.55.174.102	A	tapet.org
216.55.174.102	A	tapet.biz
216.55.174.150	A	mtsky.com
216.55.174.150	A	mx.mtsky.com
216.55.174.171	A	ypoaz.org
216.55.175.1	PTR	core-ge10hsrp2.carrierzone.com
216.55.175.2	PTR	core1-ge10s.carrierzone.com
216.55.175.3	PTR	core2-ge10s.carrierzone.com
216.55.175.184	A	socalprerunners.com
216.55.175.224	A	knolysjohnson.com
216.55.175.245	A	rockharddesigns.net