Robtex

Up: 162.223.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 162.223.80.0/23
Down right: 162.223.82.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
162.223.80.243	A	barracuda.workinc.org
162.223.80.243	A	mail.workinc.org
162.223.80.243	A	mailboxes.workinc.org
162.223.80.247	A	myworkinc.org
162.223.82.230	PTR	mail.bcnc.net
162.223.83.36	A	smtp.nycmny83.granitevoip.com
162.223.83.36	A	ntp.granitevoip.com
162.223.83.36	A	mplsdns01.granitevoip.com
162.223.83.209	A+PTR	phone.granitevoip.com
162.223.83.230	A	hnt.ssc.nycmny83.granitevoip.com
162.223.83.230	A	gennyc.granitevoip.com
162.223.83.230	A	granitevoip.com
162.223.83.245	A	tlsnyc.granitevoip.com