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Open DNS (ODNS)

DNS over UDP Scanning

Last successfull measurement:

Distribution of ODNS Components Worldwide
Number of ODNS Components:
Share of ODNS Components of Top-50 Countries

This plot shows the Top-50 countries which host the most transparent forwarders (absolut). The bars show the share of all ODNS components per country, the left y-axis shows the absolut amount of transparent forwarders active in these countries. Countries marked with a '*' are emerging markets.

Consolidation Effect of Transparent Forwarders in Top-50 Countries

This plot shows the Top-50 countries which host the most transparent forwarders (absolut). Countries marked with a '*' are emerging markets. This heatmap shows where transparent forwarders relay their requests to. Most of the requests are forwarded to resolver of Google.

Top 50 Autonomous System with most Transparent Forwarders

This table shows the top-50 autonomous systems (AS) that host most of the transparent DNS forwarders as presented in the ACM CoNEXT'21 paper. The full data set is also available as part of the artifacts collection.

ASN # Transparent Forwarders Δ Last Week [#] Δ Last Week [%] Δ Last Week [Rank]
0 45804 17251 0 0 0
1 4812 17149 0 0 0
2 58659 13359 0 0 0
3 5769 9138 0 0 0
4 52444 8538 0 0 0
5 52426 8192 0 0 0
6 52419 7377 0 0 0
7 22921 6140 0 0 0
8 37455 6038 0 0 0
9 209 5128 0 0 0
10 27881 4641 0 0 0
11 174 4532 0 0 0
12 150008 4522 0 0 0
13 28100 4420 0 0 0
14 53079 3071 0 0 0
15 18229 3047 0 0 0
16 63526 2970 0 0 0
17 47849 2537 0 0 0
18 28058 2522 0 0 0
19 29600 2447 0 0 0
20 134236 2273 0 0 0
21 135223 2252 0 0 0
22 57583 2047 0 0 0
23 134019 2047 0 0 0
24 197025 2047 0 0 0
25 262334 2046 0 0 0
26 61784 2042 0 0 0
27 135125 2014 0 0 0
28 56456 1980 0 0 0
29 52468 1883 0 0 0
30 9534 1874 0 0 0
31 134863 1851 0 0 0
32 19901 1809 0 0 0
33 52864 1793 0 0 0
34 48326 1776 0 0 0
35 37347 1739 0 0 0
36 134866 1708 0 0 0
37 139567 1565 0 0 0
38 137139 1533 0 0 0
39 58890 1518 0 0 0
40 5639 1506 0 0 0
41 45235 1490 0 0 0
42 34984 1471 0 0 0
43 134907 1438 0 0 0
44 18002 1418 0 0 0
45 3462 1401 0 0 0
46 61689 1391 0 0 0
47 3257 1384 0 0 0
48 135628 1350 0 0 0
49 136284 1348 0 0 0