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 2025.06.01 -

gov.transportation. | Department of Transportation	v4[s]	v4[B]	v4[Mbps]	v6[s]	v6[B]	v6[Mbps]	6/4[Mbps]	v4|v6
com.facebook.www  (https)  [v6R] 1/0.044450s	0.118392	79257	5.12	0.147450	76877	3.99	78%	graph
com.fontawesome.use  (https)	0.131874	27150	1.58	0.153121	27150	1.35	86%	graph
com.govdelivery.public  (https)  [v4R] 1/0.166974s  [v6R] 1/0.159876s	0.226549	8657	0.29	0.216621	8657	0.31	105%	graph
com.instagram.www  (https)	0.257057	447112	13.27	0.319645	447270	10.70	81%	graph
com.libanswers.transportation  (https)	0.086298	38412	3.41	0.003380	0	0	n/a	graph
com.linkedin.www  (https)	0.167214	138931	6.35	0.139026	138931	7.63	120%	graph
com.twitter  (https)  [v4R] 1/0.053874s	0.164642	265504	12.35	0.001174	0	0	n/a	graph
com.youtube.www  (https)	0.188728	613581	24.90	0.162630	617074	29.06	117%	graph
gov.bts.www  (https)	0.036512	74648	15.82	0.066675	74648	8.63	55%	graph
gov.dot.fmcsa.www  (https)	0.036053	68283	14.47	0.031769	68283	16.81	116%	graph
gov.dot.highways  (https)	0.080597	61165	5.83	0.075416	61165	6.22	107%	graph
gov.dot.maritime.www  (https)	0.052729	71530	10.49	0.149986	71530	3.66	35%	graph
gov.dot.oig.www  (https)	0.292892	66850	1.75	0.001172	0	0	n/a	graph
gov.dot.phmsa.www  (https)	0.157494	62880	3.06	0.034667	62867	14.11	462%	graph
gov.dot.railroads  (https)	0.099649	72647	5.60	0.052494	72647	10.66	190%	graph
gov.dot.seaway.www  (https)	0.122705	31956	2.00	0.068671	31956	3.59	179%	graph
gov.dot.transit.www  (https)	0.175443	54327	2.37	0.067129	54327	6.19	261%	graph
gov.dot.volpe.www  (https)	0.306640	67491	1.68	0.047199	67491	10.96	651%	graph
gov.faa.www  (https)	0.036443	90311	19.14	0.045016	90311	15.31	80%	graph
gov.nhtsa.www  (https)	0.029408	94038	24.74	0.030800	94002	23.91	97%	graph
• gov.transportation.www  (https)	0.041783	72497	13.49	0.027649	72497	20.49	152%	graph
gov.usa.www  (https)	0.017925	47950	21.52	0.017694	47950	21.52	100%	graph
IPv6 operational: 100% of linked subdomains (1/1), 86% of all linked domains (19/22)	v4[s]	v4[B]	v4[Mbps]	v6[s]	v6[B]	v6[Mbps]	6/4[Mbps]	v4|v6

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