Robtex

Up: 161.51.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 161.51.8.0/22
Down right: 161.51.12.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
161.51.8.35	A+PTR	lonexir300.mwkl.co.uk
161.51.8.38	A+PTR	mailp8.kbr.com
161.51.8.39	A+PTR	mailp9.kbr.com
161.51.8.40	A+PTR	mailp4.kbr.com
161.51.8.53	A+PTR	mailp3.kbr.com
161.51.8.57	A	ea-kbrremote.kbr.com
161.51.8.67	A+PTR	mailm8.kbr.com
161.51.8.68	A+PTR	mailm9.kbr.com
161.51.8.74	A	r-s.com
161.51.8.74	A	*.r-s.com
161.51.8.74	A	mx.r-s.com
161.51.8.104	A	agtprojectscis.com
161.51.8.212	A	ea-cag.kbr.com