Robtex

Up: 67.21.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 67.21.36.0/23
Down right: 67.21.38.0/23

IP	Type	Hostname
67.21.36.1	A	researchscanner01.eecs.berkeley.edu
67.21.36.2	A+PTR	researchscanner02.eecs.berkeley.edu
67.21.36.3	A+PTR	researchscanner03.eecs.berkeley.edu
67.21.36.5	A+PTR	researchscanner05.eecs.berkeley.edu
67.21.36.6	A	researchscanner06.eecs.berkeley.edu
67.21.36.78	A+PTR	researchscanner78.eecs.berkeley.edu
67.21.36.120	A+PTR	researchscanner120.eecs.berkeley.edu
67.21.36.124	A+PTR	researchscanner124.eecs.berkeley.edu
67.21.36.137	A+PTR	researchscanner137.eecs.berkeley.edu
67.21.36.138	A+PTR	researchscanner138.eecs.berkeley.edu
67.21.36.143	A+PTR	researchscanner143.eecs.berkeley.edu
67.21.36.151	A+PTR	researchscanner151.eecs.berkeley.edu
67.21.36.154	A+PTR	researchscanner154.eecs.berkeley.edu
67.21.36.167	A+PTR	researchscanner167.eecs.berkeley.edu
67.21.36.170	A+PTR	researchscanner170.eecs.berkeley.edu
67.21.36.211	A+PTR	researchscanner211.eecs.berkeley.edu
67.21.36.222	A+PTR	researchscanner222.eecs.berkeley.edu
67.21.36.237	A+PTR	researchscanner237.eecs.berkeley.edu
67.21.36.253	A	researchscanner.eecs.berkeley.edu
67.21.36.254	PTR	researchscanner.eecs.berkeley.edu