Robtex

Up: 204.48.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 204.48.128.0/18
Down right: 204.48.192.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.48.128.9	A+PTR	ed9.sbceo.org
204.48.128.20	PTR	www.sbceo.org
204.48.128.20	A	www.sbceo.k12.ca.us
204.48.128.20	A	ftp.sbceo.org
204.48.128.30	PTR	server1.sbceo.org
204.48.169.250	A+PTR	prifw.sbceo.org
204.48.193.70	A+PTR	pubwire-70.sbceo.org
204.48.246.10	A+PTR	at01.sbceo.org
204.48.247.10	A	ccetc.net
204.48.247.10	A	www.sbceoportal.org
204.48.247.10	A	www.ccetc.net