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 2026.02.21 -

gov.pubmed. | Department of Health and Human Services	v4[s]	v4[B]	v4[Mbps]	v6[s]	v6[B]	v6[Mbps]	6/4[Mbps]	v4|v6
com.facebook.www  (https)  [v4R] 1/0.092532s  [v6R] 1/0.079149s	0.651541	457045	5.36	0.372459	458732	9.41	176%	graph
com.github  (https)	0.039918	559271	109.41	0.004119	0	0	n/a	graph
com.google-analytics.www  (https)  [v4R] 2/0.054198s  [v6R] 2/0.095336s	0.085987	118475	10.63	0.137337	118475	6.60	62%	graph
com.google.www  (https)	0.054143	17596	2.49	0.055173	17514	2.43	98%	graph
com.linkedin.www  (https)	0.158662	141194	6.82	0.190418	141194	5.67	83%	graph
com.twitter  (https)  [v4R] 1/0.054189s	0.165961	237018	10.96	0.003034	0	0	n/a	graph
com.youtube.www  (https)	0.212773	685501	24.67	0.213753	686971	24.61	100%	graph
gov.hhs.www  (https)	0.041664	365	0.07	0.030483	365	0.09	137%	graph
gov.nih.nlm.ncbi.account  (https)	0.259180	4799736	141.39	0.510427	4799736	71.80	51%	graph
gov.nih.nlm.ncbi.cdn  (https)	0.048741	119140	18.94	0.035353	119140	25.97	137%	graph
gov.nih.nlm.ncbi.ncbiinsights  (https)	0.044034	157238	27.26	0.023051	0	0	n/a	graph
gov.nih.nlm.ncbi.pubmed  (https)	0.112013	42513	2.90	0.118726	42513	2.75	95%	graph
gov.nih.nlm.ncbi.www  (https)	0.032155	37806	9.01	0.036285	37806	8.01	89%	graph
gov.nih.nlm.support  (https)	0.139292	43717	2.40	0.003036	0	0	n/a	graph
gov.nih.nlm.www  (https)	0.064173	34757	4.14	0.068557	34757	3.90	94%	graph
gov.nih.www  (https)	0.109387	56936	3.99	0.127888	56936	3.42	86%	graph
• gov.pubmed.www  (https)  [v4R] 1/0.025146s  [v6R] 1/0.034177s	0.108324	42513	3.00	0.141924	42513	2.30	77%	graph
gov.usa.www  (https)	0.019119	47580	19.11	0.019385	47580	19.11	100%	graph
IPv6 operational: 100% of linked subdomains (1/1), 78% of all linked domains (14/18)	v4[s]	v4[B]	v4[Mbps]	v6[s]	v6[B]	v6[Mbps]	6/4[Mbps]	v4|v6

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