Robtex

Up: 216.138.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 216.138.80.0/21
Down right: 216.138.88.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.138.80.2	A	mail.dces.com
216.138.80.2	A	mail.surecompanies.com
216.138.80.178	PTR	unsi-216-138-80-178.unsi.net
216.138.80.211	PTR	unsi-216-138-80-211.unsi.net
216.138.80.211	A	*.southandwestern.net
216.138.80.211	A	mail.southandwestern.net
216.138.80.212	A	thespecialtycompany.biz
216.138.80.226	A+PTR	mail.englishcolor.com
216.138.80.226	A	mailhost.englishcolor.com
216.138.80.226	A	mail.englishcollisionequipment.com
216.138.81.249	A	pop.ttimail.com
216.138.81.249	A	mailhost.ttimail.com
216.138.81.249	A	smtp.ttimail.com
216.138.82.16	PTR	unsi-216-138-82-16.unsi.net
216.138.82.106	A	mail.tsigroup.us
216.138.82.195	A+PTR	mail.owensinc.com
216.138.82.226	PTR	unsi-216-138-82-226.unsi.net
216.138.83.194	A	apexexchange.apexrestaurants.com
216.138.83.195	A	mail.apexrestaurants.com
216.138.83.196	A	mavencapital.net
216.138.84.17	PTR	unsi-216-138-84-17.unsi.net
216.138.84.32	PTR	unsi-216-138-84-32.unsi.net
216.138.84.130	PTR	unsi-216-138-84-130.unsi.net
216.138.84.192	PTR	unsi-216-138-84-192.unsi.net
216.138.87.32	PTR	unsi-216-138-87-32.unsi.net
216.138.88.51	PTR	unsi-216-138-88-51.unsi.net
216.138.88.97	PTR	unsi-216-138-88-97.unsi.net
216.138.88.130	PTR	unsi-216-138-88-130.unsi.net
216.138.88.130	A	dns02.officesmartusa.com
216.138.88.130	A	dns02.wistcloud.com
216.138.88.138	A	webhost.wist.com
216.138.88.165	A	www.aquapower.com
216.138.88.225	PTR	unsi-216-138-88-225.unsi.net
216.138.89.194	PTR	unsi-216-138-89-194.unsi.net
216.138.89.198	A	mail.myprivateletters.com
216.138.89.225	PTR	ns2.visitalk.com
216.138.90.67	PTR	nospam.solacenetworks.com
216.138.90.82	PTR	unsi-216-138-90-82.unsi.net
216.138.90.82	A	mail3.resulte.com
216.138.91.28	A	dns2.dallas-online.com
216.138.91.100	A	ns.crww.net
216.138.91.117	A	mail.torqflo.com
216.138.91.117	A	mail.compressorworks.com
216.138.91.167	A	ns2.illustro.com
216.138.91.172	A	codekillaz.net
216.138.92.83	A	mail.enhancedoilres.com
216.138.93.0	PTR	unsi-216-138-93-0.unsi.net
216.138.93.7	A	hh.barrios.com
216.138.93.22	A	mail2.barrios.com
216.138.93.22	A	ww2.barrios.com
216.138.93.82	PTR	unsi-216-138-93-82.unsi.net
216.138.93.98	PTR	unsi-216-138-93-98.unsi.net
216.138.93.113	PTR	unsi-216-138-93-113.unsi.net
216.138.93.129	A	out.barrios.com
216.138.93.130	PTR	mail4.barrios.com
216.138.93.193	PTR	unsi-216-138-93-193.unsi.net
216.138.94.98	PTR	unsi-216-138-94-98.unsi.net
216.138.94.182	A	adc.junotsystems.com
216.138.95.66	PTR	unsi-216-138-95-66.unsi.net
216.138.95.66	A	mail.gsnetx.org
216.138.95.86	A	texascookietime.org
216.138.95.86	A	texascookietime.com
216.138.95.87	A	gsnetx.com
216.138.95.88	A	trooptotroop.org