Robtex

Up: 199.230.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.230.48.0/23
Down right: 199.230.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.230.50.10	A+PTR	ns2.smuhsd.org
199.230.50.10	A+PTR	ns2.smuhsd.k12.ca.us
199.230.50.11	A+PTR	ns3.smuhsd.k12.ca.us
199.230.50.11	A	ns3.smuhsd.org
199.230.50.18	A+PTR	olr.smuhsd.org
199.230.50.19	A+PTR	upd.smuhsd.org
199.230.50.22	A	abbott.smuhsd.k12.ca.us
199.230.50.22	A	smuhsd.k12.ca.us
199.230.50.23	A+PTR	abbott.smuhsd.org
199.230.50.24	A+PTR	sloop.smuhsd.org
199.230.50.26	A+PTR	costello.smuhsd.org
199.230.50.26	PTR	costello.smuhsd.k12.ca.us
199.230.50.26	A	www.smuhsd.k12.ca.us
199.230.50.29	A+PTR	ahs.smuhsd.org
199.230.50.29	A+PTR	aragon.smuhsd.org
199.230.50.30	A+PTR	bhs.smuhsd.org
199.230.50.31	A+PTR	cap1.smuhsd.org
199.230.50.31	PTR	capuchino1.smuhsd.org
199.230.50.31	PTR	chs1.smuhsd.org
199.230.50.32	A+PTR	hhs.smuhsd.org
199.230.50.32	A+PTR	hillsdale.smuhsd.org
199.230.50.33	A	mhs.smuhsd.org
199.230.50.34	A+PTR	peninsula.smuhsd.org
199.230.50.34	PTR	phs.smuhsd.org
199.230.50.188	A+PTR	cal.smuhsd.org
199.230.51.38	A+PTR	cap.smuhsd.org
199.230.51.38	A+PTR	capuchino.smuhsd.org
199.230.51.38	A+PTR	chs.smuhsd.org
199.230.51.93	A+PTR	smace.org
199.230.51.93	A+PTR	atlas.smace.org
199.230.51.93	A+PTR	mail.smace.org
199.230.51.95	PTR	barracuda.smace.org
199.230.51.109	A+PTR	ifs1.smuhsd.org
199.230.51.118	A	barracuda.admin.smuhsd.org
199.230.51.123	A+PTR	abi-north.smuhsd.org