Robtex

Up: 140.6.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 140.6.0.0/17
Down right: 140.6.128.0/17

IP	Type	Hostname
140.6.0.1	A+PTR	np-5-1-1-nd.sandiego.core.dren.net
140.6.0.2	A+PTR	np-5-1-1-nd.nrl-dc.core.dren.net
140.6.0.3	A+PTR	np-5-1-1-nd.apg.core.dren.net
140.6.0.4	A	np-1-1-1-nd.hanscom.core.dren.net
140.6.1.1	PTR	ap-1-1-1-nd.sandiego.core.dren.net
140.6.5.2	PTR	cpe-1-1-1-nd-erdc-dsrc-hpcmp.erdc.core.dren.net
140.6.6.2	PTR	cpe-1-1-1-nd-navy-dsrc-hpcmp.stennis.core.dren.net
140.6.19.2	A+PTR	cpe-1-1-4-nd-cerl-erdc.champaign.core.dren.net
140.6.111.1	A+PTR	ap-1-3-1-nd-sspac-spawar.philly.core.dren.net