IPv6 Deployment Aggregated Status

Limited to the top-50 per Top Level Domain extracted from the free Alexa top 1 million web sites (this list has been desactivated end of November 2016 then was reactivated, hence incomplete statistics) See the bottom of this page for more information on the tests.
Click on a country to see specific statistics about top sites within this country or click on a flag:

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Compare IPv6 deployments among countries. Predict IPv6 deployments in one country. See all IPv6-enabled BitTorrent peers. Same information as XML. Show countries with less than 50 sites:

Web (Alexa)

Rank	Country	Sample size	Weighted	Green	Orange Test or broken
1	Guernsey	50	64.45%	68.0% (34)	0.0% (0)
2	Azerbaijan	50	75.25%	64.0% (32)	0.0% (0)
3	Norway	50	47.49%	62.0% (31)	2.0% (1)
4	Armenia	50	73.02%	60.0% (30)	0.0% (0)
5	Belize	50	71.35%	60.0% (30)	0.0% (0)
6	Reunion	50	58.59%	58.0% (29)	0.0% (0)
7	Montenegro	50	58.89%	56.0% (28)	0.0% (0)
8	Sweden	50	66.66%	56.0% (28)	0.0% (0)
9	Tonga	50	45.79%	54.0% (27)	2.0% (1)
10	Albania	50	63.88%	54.0% (27)	0.0% (0)
11	Iceland	50	62.97%	54.0% (27)	0.0% (0)
12	Liechtenstein	50	39.55%	52.0% (26)	0.0% (0)
13	Thailand	50	48.56%	52.0% (26)	0.0% (0)
14	Saint Helena	50	63.91%	52.0% (26)	0.0% (0)
15	Switzerland	50	49.96%	52.0% (26)	0.0% (0)
16	Dominican Republic	50	42.16%	52.0% (26)	0.0% (0)
17	Colombia	50	31.74%	50.0% (25)	0.0% (0)
18	Croatia	50	32.61%	50.0% (25)	0.0% (0)
19	United States of America	50	71.56%	48.0% (24)	4.0% (2)
20	Greece	50	71.73%	48.0% (24)	0.0% (0)
21	Cyprus	50	37.12%	46.0% (23)	0.0% (0)
22	Netherlands	50	37.50%	46.0% (23)	0.0% (0)
23	Czech Republic	50	57.29%	46.0% (23)	0.0% (0)
24	Germany	50	63.21%	44.0% (22)	0.0% (0)
25	Somalia	50	66.20%	44.0% (22)	0.0% (0)
26	South Africa	50	41.22%	44.0% (22)	0.0% (0)
27	Singapore	50	42.65%	44.0% (22)	0.0% (0)
28	Peru	50	64.47%	42.0% (21)	0.0% (0)
29	Brazil	50	52.65%	42.0% (21)	0.0% (0)
30	Pakistan	50	36.43%	42.0% (21)	0.0% (0)
31	India	50	58.36%	40.0% (20)	0.0% (0)
32	Lithuania	50	28.57%	40.0% (20)	0.0% (0)
33	Panama	50	51.02%	38.0% (19)	0.0% (0)
34	Sri Lanka	50	49.56%	38.0% (19)	0.0% (0)
35	Iraq	50	53.00%	38.0% (19)	0.0% (0)
36	Ukraine	50	32.47%	36.0% (18)	2.0% (1)
37	Australia	50	53.00%	36.0% (18)	0.0% (0)
38	Slovakia	50	30.72%	36.0% (18)	0.0% (0)
39	Argentina	50	52.89%	36.0% (18)	0.0% (0)
40	Israel	50	51.65%	34.0% (17)	0.0% (0)
41	France	50	57.95%	34.0% (17)	0.0% (0)
42	Morocco	50	57.28%	34.0% (17)	0.0% (0)
43	Costa Rica	50	51.02%	34.0% (17)	0.0% (0)
44	United-Kingdom	50	61.43%	32.0% (16)	0.0% (0)
45	Denmark	50	13.47%	32.0% (16)	0.0% (0)
46	Kuwait	50	47.15%	32.0% (16)	0.0% (0)
47	Romania	50	56.05%	32.0% (16)	0.0% (0)
48	Hungary	50	45.79%	30.0% (15)	2.0% (1)
49	Uganda	50	55.24%	30.0% (15)	0.0% (0)
50	Latvia	50	18.55%	30.0% (15)	0.0% (0)
51	Turkey	50	38.81%	30.0% (15)	0.0% (0)
52	Anguilla	50	45.73%	30.0% (15)	0.0% (0)
53	Austria	50	47.85%	30.0% (15)	0.0% (0)
54	Egypt	50	59.82%	30.0% (15)	0.0% (0)
55	Guatemala	50	39.37%	30.0% (15)	0.0% (0)
56	Mauritius	50	26.08%	30.0% (15)	0.0% (0)
57	Macedonia	50	45.04%	30.0% (15)	0.0% (0)
58	Libya	50	32.01%	28.0% (14)	4.0% (2)
59	Poland	50	10.73%	28.0% (14)	2.0% (1)
60	Serbia	50	29.58%	28.0% (14)	0.0% (0)
61	Italy	50	52.25%	28.0% (14)	0.0% (0)
62	Mongolia	50	40.73%	26.0% (13)	0.0% (0)
63	Ghana	50	47.32%	26.0% (13)	0.0% (0)
64	Chile	50	34.50%	26.0% (13)	0.0% (0)
65	Spain	50	25.66%	26.0% (13)	0.0% (0)
66	Vietnam	50	31.62%	26.0% (13)	0.0% (0)
67	Tunisia	50	50.52%	26.0% (13)	0.0% (0)
68	Portugal	50	20.88%	24.0% (12)	0.0% (0)
69	Taiwan	50	32.76%	22.0% (11)	0.0% (0)
70	Canada	50	26.03%	22.0% (11)	0.0% (0)
71	Lebanon	50	26.62%	22.0% (11)	0.0% (0)
72	Mexico	50	37.87%	22.0% (11)	0.0% (0)
73	China	50	14.41%	20.0% (10)	6.0% (3)
74	Cote d'Ivoire	50	48.96%	20.0% (10)	2.0% (1)
75	Kyrgyzstan	50	19.96%	20.0% (10)	0.0% (0)
76	Qatar	50	38.45%	20.0% (10)	0.0% (0)
77	Japan	50	20.95%	18.0% (9)	0.0% (0)
78	Bahrain	50	19.96%	18.0% (9)	0.0% (0)
79	Nepal	50	13.66%	18.0% (9)	0.0% (0)
80	Oman	50	13.42%	18.0% (9)	0.0% (0)
81	Russia	50	18.93%	14.0% (7)	2.0% (1)
82	United Arab Emirates	50	43.47%	14.0% (7)	0.0% (0)
83	Saudi Arabia	50	38.58%	14.0% (7)	0.0% (0)
84	Belarus	50	30.20%	14.0% (7)	0.0% (0)
85	Jordan	50	33.76%	14.0% (7)	0.0% (0)
86	Venezuela	50	28.47%	12.0% (6)	0.0% (0)
87	Kazakhstan	50	30.27%	10.0% (5)	0.0% (0)
88	South Korea	50	5.96%	10.0% (5)	0.0% (0)
89	Uzbekistan	50	4.16%	6.0% (3)	0.0% (0)
90	Algeria	50	26.15%	4.0% (2)	0.0% (0)

Email (Alexa)

Rank	Country	Sample size	Weighted	Green	Orange Test or broken
1	Anguilla	50	39.19%	66.0% (33)	0.0% (0)
2	Libya	50	60.59%	54.0% (27)	0.0% (0)
3	Guernsey	50	48.71%	54.0% (27)	0.0% (0)
4	Brazil	50	26.99%	50.0% (25)	0.0% (0)
5	Vietnam	50	55.06%	50.0% (25)	0.0% (0)
6	United States of America	50	61.46%	50.0% (25)	0.0% (0)
7	Ukraine	50	57.95%	46.0% (23)	0.0% (0)
8	Czech Republic	50	49.83%	44.0% (22)	0.0% (0)
9	Pakistan	50	57.54%	40.0% (20)	0.0% (0)
10	Iraq	50	47.73%	40.0% (20)	0.0% (0)
11	Greece	50	61.66%	40.0% (20)	0.0% (0)
12	Thailand	50	40.92%	38.0% (19)	8.0% (4)
13	Panama	50	54.94%	38.0% (19)	0.0% (0)
14	Belarus	50	61.00%	36.0% (18)	4.0% (2)
15	Azerbaijan	50	35.01%	36.0% (18)	2.0% (1)
16	Sweden	50	17.18%	34.0% (17)	0.0% (0)
17	Chile	50	43.79%	34.0% (17)	0.0% (0)
18	Norway	50	32.86%	34.0% (17)	0.0% (0)
19	Spain	50	46.71%	34.0% (17)	0.0% (0)
20	Taiwan	50	47.07%	34.0% (17)	0.0% (0)
21	Russia	50	24.88%	32.0% (16)	4.0% (2)
22	Armenia	50	39.43%	32.0% (16)	2.0% (1)
23	Latvia	50	25.19%	32.0% (16)	0.0% (0)
24	Italy	50	20.82%	32.0% (16)	0.0% (0)
25	Algeria	50	35.91%	32.0% (16)	0.0% (0)
26	Colombia	50	21.62%	32.0% (16)	0.0% (0)
27	Uganda	50	53.15%	32.0% (16)	0.0% (0)
28	Somalia	50	15.11%	32.0% (16)	0.0% (0)
29	India	50	28.78%	30.0% (15)	0.0% (0)
30	Saint Helena	50	39.75%	30.0% (15)	0.0% (0)
31	Lithuania	50	27.50%	30.0% (15)	0.0% (0)
32	Netherlands	50	51.27%	30.0% (15)	0.0% (0)
33	Cyprus	50	26.12%	30.0% (15)	0.0% (0)
34	Hungary	50	29.35%	30.0% (15)	0.0% (0)
35	Switzerland	50	17.14%	30.0% (15)	0.0% (0)
36	Denmark	50	44.65%	30.0% (15)	0.0% (0)
37	Kazakhstan	50	44.64%	28.0% (14)	4.0% (2)
38	Dominican Republic	50	53.12%	28.0% (14)	0.0% (0)
39	Poland	50	15.75%	28.0% (14)	0.0% (0)
40	Ghana	50	38.19%	26.0% (13)	0.0% (0)
41	United-Kingdom	50	37.75%	26.0% (13)	0.0% (0)
42	Croatia	50	37.29%	26.0% (13)	0.0% (0)
43	Guatemala	50	34.03%	26.0% (13)	0.0% (0)
44	Argentina	50	28.49%	26.0% (13)	0.0% (0)
45	Peru	50	39.73%	26.0% (13)	0.0% (0)
46	Egypt	50	41.60%	24.0% (12)	0.0% (0)
47	Slovakia	50	41.17%	24.0% (12)	0.0% (0)
48	Singapore	50	32.13%	24.0% (12)	0.0% (0)
49	Mexico	50	18.37%	24.0% (12)	0.0% (0)
50	South Africa	50	34.73%	24.0% (12)	0.0% (0)
51	Sri Lanka	50	51.95%	24.0% (12)	0.0% (0)
52	Romania	50	28.97%	24.0% (12)	0.0% (0)
53	Uzbekistan	50	39.29%	22.0% (11)	2.0% (1)
54	France	50	38.80%	22.0% (11)	2.0% (1)
55	Japan	50	18.44%	22.0% (11)	0.0% (0)
56	Serbia	50	29.91%	22.0% (11)	0.0% (0)
57	Portugal	50	21.69%	22.0% (11)	0.0% (0)
58	Turkey	50	29.75%	22.0% (11)	0.0% (0)
59	Macedonia	50	38.27%	22.0% (11)	0.0% (0)
60	Kyrgyzstan	50	17.64%	22.0% (11)	0.0% (0)
61	Tunisia	50	46.47%	20.0% (10)	6.0% (3)
62	Venezuela	50	41.07%	20.0% (10)	0.0% (0)
63	Montenegro	50	8.98%	20.0% (10)	0.0% (0)
64	Germany	50	51.88%	20.0% (10)	0.0% (0)
65	Canada	50	19.83%	20.0% (10)	0.0% (0)
66	Israel	50	37.96%	18.0% (9)	0.0% (0)
67	Oman	50	16.61%	18.0% (9)	0.0% (0)
68	Australia	50	12.70%	18.0% (9)	0.0% (0)
69	Nepal	50	31.39%	16.0% (8)	2.0% (1)
70	Kuwait	50	29.69%	16.0% (8)	0.0% (0)
71	Cote d'Ivoire	50	44.40%	16.0% (8)	0.0% (0)
72	Iceland	50	40.14%	16.0% (8)	0.0% (0)
73	Mongolia	50	17.22%	16.0% (8)	0.0% (0)
74	Morocco	50	25.96%	14.0% (7)	4.0% (2)
75	Albania	50	16.92%	14.0% (7)	2.0% (1)
76	South Korea	50	8.63%	14.0% (7)	0.0% (0)
77	Lebanon	50	12.67%	14.0% (7)	0.0% (0)
78	Mauritius	50	14.44%	14.0% (7)	0.0% (0)
79	Saudi Arabia	50	34.09%	12.0% (6)	0.0% (0)
80	Reunion	50	7.51%	12.0% (6)	0.0% (0)
81	Liechtenstein	50	4.82%	10.0% (5)	2.0% (1)
82	Bahrain	50	14.73%	10.0% (5)	0.0% (0)
83	Austria	50	8.20%	10.0% (5)	0.0% (0)
84	Belize	50	6.86%	10.0% (5)	0.0% (0)
85	Tonga	50	3.79%	10.0% (5)	0.0% (0)
86	United Arab Emirates	50	15.27%	8.0% (4)	0.0% (0)
87	China	50	8.41%	8.0% (4)	0.0% (0)
88	Jordan	50	27.05%	8.0% (4)	0.0% (0)
89	Costa Rica	50	5.59%	8.0% (4)	0.0% (0)
90	Qatar	50	8.60%	4.0% (2)	0.0% (0)

DNS (Alexa)

Rank	Country	Sample size	Weighted	Green	Orange Test or broken
1	Guernsey	50	91.52%	98.0% (49)	0.0% (0)
2	Anguilla	50	79.97%	94.0% (47)	2.0% (1)
3	Australia	50	89.96%	94.0% (47)	2.0% (1)
4	Netherlands	50	78.67%	94.0% (47)	2.0% (1)
5	United States of America	50	86.09%	94.0% (47)	2.0% (1)
6	Sweden	50	88.39%	94.0% (47)	0.0% (0)
7	Germany	50	90.27%	92.0% (46)	2.0% (1)
8	Tonga	50	90.01%	92.0% (46)	2.0% (1)
9	Montenegro	50	73.41%	92.0% (46)	0.0% (0)
10	Colombia	50	75.04%	92.0% (46)	0.0% (0)
11	Lithuania	50	84.68%	92.0% (46)	0.0% (0)
12	France	50	82.77%	90.0% (45)	2.0% (1)
13	Dominican Republic	50	82.21%	88.0% (44)	4.0% (2)
14	Norway	50	86.92%	88.0% (44)	2.0% (1)
15	Bahrain	50	79.51%	88.0% (44)	0.0% (0)
16	Somalia	50	83.84%	88.0% (44)	0.0% (0)
17	Singapore	50	84.32%	86.0% (43)	6.0% (3)
18	Denmark	50	77.09%	86.0% (43)	4.0% (2)
19	Switzerland	50	87.30%	86.0% (43)	2.0% (1)
20	Reunion	50	82.01%	86.0% (43)	2.0% (1)
21	Belize	50	84.74%	84.0% (42)	2.0% (1)
22	Iceland	50	84.09%	84.0% (42)	2.0% (1)
23	Saint Helena	50	87.13%	84.0% (42)	0.0% (0)
24	Czech Republic	50	74.25%	82.0% (41)	2.0% (1)
25	Liechtenstein	50	60.77%	82.0% (41)	2.0% (1)
26	Croatia	50	81.58%	82.0% (41)	2.0% (1)
27	Austria	50	86.88%	82.0% (41)	0.0% (0)
28	Ukraine	50	78.48%	80.0% (40)	4.0% (2)
29	Brazil	50	56.40%	80.0% (40)	2.0% (1)
30	United-Kingdom	50	84.55%	80.0% (40)	2.0% (1)
31	Thailand	50	74.96%	78.0% (39)	6.0% (3)
32	South Africa	50	72.72%	78.0% (39)	6.0% (3)
33	Spain	50	82.09%	76.0% (38)	4.0% (2)
34	Romania	50	83.45%	76.0% (38)	2.0% (1)
35	Canada	50	82.57%	76.0% (38)	2.0% (1)
36	Mexico	50	59.14%	76.0% (38)	2.0% (1)
37	Pakistan	50	78.70%	76.0% (38)	0.0% (0)
38	Israel	50	74.87%	74.0% (37)	6.0% (3)
39	Taiwan	50	76.56%	74.0% (37)	4.0% (2)
40	Cyprus	50	56.26%	74.0% (37)	0.0% (0)
41	Latvia	50	44.31%	72.0% (36)	4.0% (2)
42	Vietnam	50	68.63%	70.0% (35)	8.0% (4)
43	Poland	50	69.44%	70.0% (35)	4.0% (2)
44	Panama	50	75.06%	70.0% (35)	0.0% (0)
45	India	50	76.43%	68.0% (34)	12.0% (6)
46	Armenia	50	73.39%	68.0% (34)	4.0% (2)
47	Azerbaijan	50	78.80%	68.0% (34)	2.0% (1)
48	Slovakia	50	48.72%	68.0% (34)	2.0% (1)
49	Albania	50	78.73%	68.0% (34)	2.0% (1)
50	Japan	50	49.04%	68.0% (34)	0.0% (0)
51	Chile	50	66.65%	68.0% (34)	0.0% (0)
52	Guatemala	50	69.74%	64.0% (32)	4.0% (2)
53	Mauritius	50	68.13%	64.0% (32)	4.0% (2)
54	Lebanon	50	66.69%	64.0% (32)	2.0% (1)
55	Sri Lanka	50	75.65%	62.0% (31)	16.0% (8)
56	Greece	50	74.25%	62.0% (31)	4.0% (2)
57	Hungary	50	55.50%	62.0% (31)	2.0% (1)
58	Libya	50	73.88%	62.0% (31)	0.0% (0)
59	Peru	50	76.44%	58.0% (29)	12.0% (6)
60	Portugal	50	44.75%	58.0% (29)	0.0% (0)
61	Italy	50	67.32%	58.0% (29)	0.0% (0)
62	Turkey	50	52.30%	56.0% (28)	2.0% (1)
63	Iraq	50	57.67%	56.0% (28)	0.0% (0)
64	Serbia	50	64.58%	56.0% (28)	0.0% (0)
65	China	50	64.47%	54.0% (27)	0.0% (0)
66	Macedonia	50	64.04%	54.0% (27)	0.0% (0)
67	United Arab Emirates	50	60.59%	50.0% (25)	0.0% (0)
68	Egypt	50	65.60%	48.0% (24)	4.0% (2)
69	Costa Rica	50	55.31%	46.0% (23)	6.0% (3)
70	Cote d'Ivoire	50	62.32%	46.0% (23)	0.0% (0)
71	Kuwait	50	59.45%	46.0% (23)	0.0% (0)
72	Mongolia	50	53.25%	42.0% (21)	2.0% (1)
73	Tunisia	50	59.40%	42.0% (21)	2.0% (1)
74	Uganda	50	62.82%	42.0% (21)	0.0% (0)
75	Argentina	50	67.38%	40.0% (20)	6.0% (3)
76	Ghana	50	63.59%	40.0% (20)	2.0% (1)
77	Jordan	50	54.48%	38.0% (19)	30.0% (15)
78	Belarus	50	62.70%	38.0% (19)	14.0% (7)
79	Qatar	50	23.50%	38.0% (19)	2.0% (1)
80	Saudi Arabia	50	55.58%	38.0% (19)	2.0% (1)
81	Venezuela	50	48.97%	38.0% (19)	2.0% (1)
82	Morocco	50	64.01%	38.0% (19)	0.0% (0)
83	Kyrgyzstan	50	23.52%	34.0% (17)	12.0% (6)
84	Russia	50	50.20%	34.0% (17)	10.0% (5)
85	Kazakhstan	50	40.36%	32.0% (16)	16.0% (8)
86	South Korea	50	15.82%	30.0% (15)	2.0% (1)
87	Oman	50	22.69%	30.0% (15)	0.0% (0)
88	Nepal	50	47.21%	26.0% (13)	16.0% (8)
89	Uzbekistan	50	37.72%	26.0% (13)	2.0% (1)
90	Iran	50	15.84%	18.0% (9)	0.0% (0)
91	Algeria	50	26.83%	6.0% (3)	0.0% (0)

IPv6 Enabled Users (Google)

Rank	Country	%-age
1	France	72.57 %
2	Germany	66.32 %
3	India	65.14 %
4	Greece	61.06 %
5	Malaysia	60.53 %
6	Saudi Arabia	60.39 %
7	Belgium	57.36 %
8	United States of America	52.46 %
9	Uruguay	52.12 %
10	Taiwan	50.98 %
11	Vietnam	50.82 %
12	Finland	50.53 %
13	Israel	49.56 %
14	Sri Lanka	49.15 %
15	United Arab Emirates	47.97 %
16	Japan	47.80 %
17	Hungary	45.46 %
18	Mexico	44.13 %
19	Brazil	43.46 %
20	United-Kingdom	43.16 %
21	Thailand	42.02 %
22	Guatemala	37.14 %
23	Switzerland	35.45 %
24	Canada	34.13 %
25	Bhutan	33.26 %
26	Portugal	32.91 %
27	Nepal	31.93 %
28	Australia	29.44 %
29	Austria	29.36 %
30	Puerto Rico	28.69 %
31	Paraguay	27.60 %
32	Romania	27.37 %
33	Peru	26.07 %
34	Norway	25.58 %
35	Gabon	25.12 %
36	Ecuador	24.97 %
37	Ireland	24.05 %
38	Czech Republic	23.62 %
39	Trinidad and Tobago	23.01 %
40	Colombia	21.96 %
41	Togo	21.88 %
42	Singapore	20.67 %
43	Myanmar (Burma)	19.98 %
44	Poland	19.25 %
45	South Korea	18.90 %
46	Suriname	18.65 %
47	New Zealand	18.03 %
48	Kuwait	17.89 %
49	Bolivia	17.46 %
50	Sweden	17.20 %
51	Philippines	16.76 %
52	Oman	15.88 %
53	Macau	15.85 %
54	Argentina	15.83 %
55	Congo (Brazzaville)	15.44 %
56	Indonesia	14.34 %
57	El Salvador	12.52 %
58	Chile	12.24 %
59	Bermuda	12.16 %
60	Slovenia	12.15 %
61	Georgia	11.93 %
62	Jordan	11.21 %
63	Guyana (Republic of)	11.14 %
64	Jamaica	10.99 %
65	Bulgaria	10.81 %
66	Belarus	10.11 %
67	Bosnia and Herzegovina	9.70 %
68	Ukraine	8.76 %
69	Netherlands	8.62 %
70	Zimbabwe	8.54 %
71	Kazakhstan	8.45 %
72	Slovakia	8.44 %
73	Rwanda	8.42 %
74	Saint Lucia	8.38 %
75	Moldova	8.34 %
76	Nicaragua	8.25 %
77	Denmark	7.97 %
78	Italy	7.44 %
79	Saint Vincent and the Grenadines	7.05 %
80	Virgin Islands (Bristish)	7.00 %
81	Albania	6.58 %
82	Russia	6.46 %
83	Honduras	6.44 %
84	Serbia	6.18 %
85	Belize	6.16 %
86	Pakistan	5.93 %
87	Kenya	5.86 %
88	Croatia	5.80 %
89	Armenia	5.70 %
90	Costa Rica	5.30 %
91	Papua New Guinea	4.87 %
92	Burkina Faso	4.24 %
93	Egypt	4.16 %
94	Iran	3.70 %
95	China	3.69 %
96	Namibia	3.26 %
97	Grenada	3.25 %
98	Spain	3.12 %
99	Panama	3.06 %
100	South Africa	2.64 %

Tests are:

Web:
- GREEN: a AAAA exists for www.$domain or $domain and an HTTP connection over IPv6 was successful
- ORANGE: a AAAA exists for www6.$domain or ipv6.$domain or www.ipv6.$domain and an HTTP connection over IPv6 was successful
- RED: no AAAA exists for any sensible derivation of $domain or an HTTP connection over IPv6 was not succesful
Email:
- GREEN: a AAAA exists for one MX of $domain and a SMTP connection over IPv6 was successful
- ORANGE: a AAAA exists for one MX of $domain but a SMTP connection over IPv6 was not successful
- RED: no AAAA exists for any MX of $domain
DNS:
- GREEN: a AAAA exists for one NS of $domain and a DNS query over IPv6 was answered
- RED: no AAAA exists for any NS of $domain but a DNS query over IPv6 was not answered
- n/m: means n servers out of m have an IPv6 address

OpenDNS rank is n/m meaning n^th in the country (actually TLD -- so not very accurate) and m^th worldwide. Before 20th of November 2016, the world-wide ranking was based on Alexa top 1 million web sites until the service was discontinued by Alexa. Since 20th of December 2016, the source of the top 1 million is Umbrella service by OpenDNS (a Cisco division). The data set are not consistent, so, it may be difficult to compare the situation before and after December 2016.

Based on same prior art from Mark Prior at http://www.mrp.net/IPv6_Survey.html.
You may also be interested in statistics for IPv6 browsers at https://www.vyncke.org/countv6/stats.php.