Referenced Domain IPv4/IPv6 Web Statistics

Background and Methodology	IPv6 & DNSSEC SnapShots
USG IPv6 & DNSSEC Statistics	USG IPv4 Statistics
Industry IPv6 & DNSSEC Statistics	Industry IPv4 Statistics
University IPv6 & DNSSEC Statistics	University IPv4 Statistics
CFO Act Agency Summary Statistics	USG IPv6 Enabled WWW Sites

- Referenced Domain Web Statistics for 2026.07.21 -

gov.selectagents. | Department of Health and Human Services	v4[s]	v4[B]	v4[Mbps]	v6[s]	v6[B]	v6[Mbps]	6/4[Mbps]	v4|v6
com.responsibledisclosure.hhs  (https)  [v4R] 2/0.198979s	0.211244	5422	0.20	0.003032	0	0	n/a	graph
gov.cdc.www  (https)  [v4R] 1/0.048805s  [v6R] 1/0.053723s	0.305766	61013	1.53	0.084451	61013	5.54	363%	graph
gov.hhs.oig  (https)	0.245411	49840	1.55	0.004117	0	0	n/a	graph
gov.hhs.www  (https)	0.347111	365	0.01	0.044043	365	0.06	789%	graph
gov.nih.od.osp  (https)	0.451221	63245	1.07	0.440538	63245	1.10	103%	graph
gov.oversight.usdaoig  (https)  [v4R] 1/0.367603s  [v6R] 1/0.237644s	0.830665	70800	0.65	0.260484	0	0	n/a	graph
gov.selectagents.efsap  (https)	0.000	0	0	0.009457	0	0	n/a	graph
• gov.selectagents.www  (https)	0.304560	70760	1.78	0.158809	70760	3.42	192%	graph
IPv6 operational: 50% of linked subdomains (1/2), 50% of all linked domains (4/8)	v4[s]	v4[B]	v4[Mbps]	v6[s]	v6[B]	v6[Mbps]	6/4[Mbps]	v4|v6

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