Robtex

Up: 199.164.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.164.56.0/23
Down right: 199.164.58.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.164.57.6	A+PTR	ftp.calpers.ca.gov
199.164.57.8	PTR	www.calpers.com
199.164.57.8	A+PTR	calpers.ca.gov
199.164.57.8	A+PTR	www.calpers.net
199.164.57.40	A+PTR	smtp.calpers.ca.gov
199.164.57.41	A+PTR	smtp.calpers.ca.gov
199.164.57.50	A+PTR	smtp2.calpers.ca.gov
199.164.57.50	A	mail.calpersresponds.com
199.164.57.51	A+PTR	smtp3.calpers.ca.gov
199.164.57.60	A+PTR	www-simext-mycalpers.calpers.ca.gov
199.164.57.67	PTR	calftpemc.calpers.ca.gov
199.164.57.134	A+PTR	mycalpers.com
199.164.57.134	PTR	mycalpers.net
199.164.57.134	PTR	mycalpers.org
199.164.57.156	A+PTR	sccm-test.calpers.ca.gov
199.164.57.156	PTR	webmail.calpers.ca.gov
199.164.57.192	A+PTR	accounts.calpers.ca.gov
199.164.59.7	A+PTR	vpn.calpers.ca.gov