Robtex

Up: 208.84.66.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 208.84.67.0/25
Down right: 208.84.67.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.84.67.1	A+PTR	cr001-lo0-at1.proofpoint.com
208.84.67.2	A	cr002-lo0-at1.proofpoint.com
208.84.67.3	PTR	208-84-67-3.proofpoint.com
208.84.67.4	PTR	208-84-67-4.proofpoint.com
208.84.67.5	PTR	208-84-67-5.proofpoint.com
208.84.67.9	A+PTR	cr001-ge-0-0-1-100-at1.proofpoint.com
208.84.67.10	A	cr002-ge-0-0-1-100-at1.proofpoint.com
208.84.67.13	A+PTR	cr001-ge-2-0-5-0-at1.proofpoint.com
208.84.67.14	A+PTR	cr002-ge-2-0-5-0-at1.proofpoint.com
208.84.67.15	PTR	208-84-67-15.proofpoint.com
208.84.67.16	PTR	208-84-67-16.proofpoint.com
208.84.67.17	A	cr-vrrp-101-at1.proofpoint.com
208.84.67.18	A+PTR	cr001-ge-0-0-1-101-at1.proofpoint.com
208.84.67.19	A+PTR	cr001-ge-0-0-1-101-at1.proofpoint.com
208.84.67.20	PTR	208-84-67-20.proofpoint.com
208.84.67.21	PTR	208-84-67-21.proofpoint.com
208.84.67.21	A	spf-mailers.proofpoint.com
208.84.67.23	PTR	208-84-67-23.proofpoint.com
208.84.67.24	PTR	208-84-67-24.proofpoint.com
208.84.67.24	A	sa-at1.proofpoint.com
208.84.67.29	PTR	208-84-67-29.proofpoint.com
208.84.67.29	A	spf-mailers.proofpoint.com
208.84.67.30	A+PTR	sa-at1.proofpoint.com
208.84.67.32	PTR	208-84-67-32.proofpoint.com
208.84.67.33	A	cr-vrrp-105-at1.proofpoint.com
208.84.67.34	A	cr001-ge-0-0-0-105-at1.proofpoint.com
208.84.67.35	A	cr002-ge-0-0-0-105-at1.proofpoint.com
208.84.67.36	PTR	208-84-67-36.proofpoint.com
208.84.67.39	PTR	208-84-67-39.proofpoint.com
208.84.67.40	A	lb001-ge-11-12-at1.proofpoint.com
208.84.67.41	A	lb002-ge-11-12-at1.proofpoint.com
208.84.67.42	A+PTR	lb-vip-at1.proofpoint.com
208.84.67.42	A	spf-mailers.proofpoint.com
208.84.67.43	A	lb003-ge-11-12-at1.proofpoint.com
208.84.67.44	A	lb004-ge-11-12-at1.proofpoint.com
208.84.67.46	A+PTR	lb005-ge-11-12-at1.proofpoint.com
208.84.67.50	A+PTR	ns-at1.proofpoint.us
208.84.67.50	A+PTR	ns-at1.proofpoint.com
208.84.67.195	A+PTR	prs-at1.proofpoint.com
208.84.67.195	A	prsns2.proofpoint.com
208.84.67.196	A+PTR	update-at1.proofpoint.com
208.84.67.196	A	v3.update.proofpoint.com
208.84.67.196	A	update2.proofpoint.com
208.84.67.197	A+PTR	pdus-at1.proofpoint.com
208.84.67.197	A	pdus.proofpoint.com
208.84.67.198	A+PTR	ntp-at1.proofpoint.com
208.84.67.198	A	ntp.proofpoint.com
208.84.67.206	A	update-test-at1.proofpoint.com
208.84.67.207	A+PTR	pdus-at1-lb001.proofpoint.com
208.84.67.208	A+PTR	ns1.proofpoint.com
208.84.67.208	A+PTR	ns1-at1.proofpoint.com
208.84.67.208	A+PTR	ns5.proofpoint.com
208.84.67.209	PTR	zerohour-at1.proofpoint.com
208.84.67.209	A	zerohour3.proofpoint.com
208.84.67.209	A	zerohour.proofpoint.com
208.84.67.210	A	mxat1001.piscesdns.net
208.84.67.212	A+PTR	hks-at1.proofpoint.com
208.84.67.212	A	pphks.gslb.pphosted.com
208.84.67.215	A+PTR	pdus-test-at1.proofpoint.com
208.84.67.253	A+PTR	api-at1.proofpoint.com