Robtex

Up: 192.4.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 192.4.48.0/21
Down right: 192.4.56.0/21

IP	Type	Hostname
192.4.51.74	A+PTR	cincinnati-router.cc.telcordia.com
192.4.51.77	A	telcordia-unisys-hsrp.ise.telcordia.com
192.4.51.130	PTR	nike-mgt.cc.telcordia.com
192.4.61.3	A+PTR	otm1.cc.telcordia.com
192.4.61.4	PTR	tqserver1.cc.telcordia.com
192.4.61.10	A	ssrnet.cc.telcordia.com
192.4.61.11	A	tapiserv.cc.telcordia.com
192.4.61.16	PTR	cream.cc.telcordia.com