Robtex

Up: 144.74.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 144.74.16.0/22
Down right: 144.74.20.0/22

IP	Type	Hostname
144.74.18.24	A	dclab02.rush.edu
144.74.21.1	A+PTR	tob-router-hsrp.rushnet.rpslmc.edu
144.74.21.8	PTR	sunstroke.is.rpslmc.edu
144.74.21.158	A+PTR	alexis.rpslmc.edu
144.74.22.1	PTR	datactr-a-hsrp.rushnet.rpslmc.edu
144.74.22.1	A	tob-router-hsrp.rushnet.rpslmc.edu
144.74.22.3	A+PTR	tobdist-router.rushnet.rpslmc.edu
144.74.22.8	PTR	thumper.rpslmc.edu
144.74.22.8	A	thumper.rush.edu
144.74.23.1	PTR	datactr-a-hsrp.rushnet.rpslmc.edu
144.74.23.1	A	tob-router-hsrp.rushnet.rpslmc.edu
144.74.23.3	A+PTR	tobdist-router.rushnet.rpslmc.edu