Robtex

Up: 209.66.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 209.66.200.0/22
Down right: 209.66.204.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
209.66.200.1	PTR	pat-alpine.sdcoe.net
209.66.200.4	PTR	pat-bonsall.sdcoe.net
209.66.200.10	PTR	pat-dehesa.sdcoe.net
209.66.200.18	PTR	pat-julian-ele.sdcoe.net
209.66.200.34	PTR	pat-solanabeach.sdcoe.net
209.66.200.43	PTR	pat-julian-high.sdcoe.net
209.66.200.64	PTR	pat-oceanside.sdcoe.net
209.66.200.65	PTR	pat-sanmarcos.sdcoe.net
209.66.200.153	PTR	out200-153.sdcoe.net
209.66.201.10	PTR	out201-10.sdcoe.net
209.66.202.50	PTR	out202-50.sdcoe.net
209.66.203.33	PTR	out203-33.sdcoe.net
209.66.203.34	PTR	out203-34.sdcoe.net
209.66.203.34	A	ns1.sbsd.k12.ca.us
209.66.203.36	A	mailgateway.sbsd.k12.ca.us
209.66.203.36	A	mailgateway.sbsd.net
209.66.203.43	PTR	out203-43.sdcoe.net
209.66.203.43	A	mail.sbsd.net
209.66.203.43	A	mail.sbsd.k12.ca.us
209.66.203.48	PTR	out203-48.sdcoe.net
209.66.203.48	A	mailgateway2.sbsd.net
209.66.203.48	A	mailgateway2.sbsd.k12.ca.us
209.66.203.57	PTR	out203-57.sdcoe.net
209.66.203.65	A+PTR	gp.vcpusd.k12.ca.us
209.66.203.66	PTR	out203-66.sdcoe.net
209.66.203.66	A	dnshost.vcpusd.k12.ca.us
209.66.203.66	A	dnshost.vcpusd.net
209.66.203.100	A	lmsvsd.lmsvsd.k12.ca.us
209.66.203.142	A	mail.coronado.k12.ca.us
209.66.203.144	PTR	out203-144.sdcoe.net
209.66.203.144	A	www.coronado.k12.ca.us
209.66.203.144	A	coronado.k12.ca.us
209.66.203.146	PTR	out203-146.sdcoe.net
209.66.203.146	A	mailfilter.coronado.k12.ca.us
209.66.203.146	A	mailfilter.coronadousd.com
209.66.204.100	A	dorlandhealthcare.com
209.66.205.72	PTR	out205-72.sdcoe.net
209.66.205.98	PTR	out205-98.sdcoe.net
209.66.207.26	PTR	out207-26.sdcoe.net