Robtex

Up: 192.48.78.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.48.79.0/25
Down right: 192.48.79.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.48.79.1	A+PTR	gw.j.nstld.com
192.48.79.9	A	vrrp.j.nstld.com
192.48.79.10	A+PTR	igw1.j.nstld.com
192.48.79.11	A	igw2.j.nstld.com
192.48.79.30	A+PTR	j.gtld-servers.net
192.48.79.30	A	j.gtld-servers.com
192.48.79.30	A	j.edu-servers.net
192.48.79.31	A+PTR	j2.nstld.com
192.48.79.31	A	j2.gov-servers.net
192.48.79.32	PTR	j3.nstld.com
192.48.79.33	PTR	j4.nstld.com
192.48.79.34	PTR	j5.nstld.com
192.48.79.35	PTR	j6.nstld.com
192.48.79.36	A+PTR	j7.nstld.com
192.48.79.37	A+PTR	j8.nstld.com
192.48.79.38	PTR	j9.nstld.com
192.48.79.39	PTR	j10.nstld.com