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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 19295 4677 32 0
1 4812 14661 3481 31 0
2 17771 9691 2393 33 0
3 52444 8600 2160 34 0
4 37455 8167 2029 33 0
5 209 7562 1833 32 0
6 27881 7398 1795 32 0
7 5769 6783 1625 32 0
8 37403 6633 1596 32 0
9 22921 6130 1532 33 0
10 58659 5662 1422 34 0
11 52271 5254 1242 31 0
12 28198 4384 1038 31 0
13 150008 4366 1083 33 0
14 18229 3126 757 32 0
15 47849 3054 722 31 0
16 52864 3053 725 31 0
17 135076 3050 740 32 0
18 264100 2931 727 33 0
19 47524 2540 606 31 0
20 63526 2520 630 33 0
21 58890 2519 633 34 0
22 19901 2454 595 32 0
23 29600 2444 587 32 0
24 134019 2295 579 34 0
25 5483 2148 531 33 0
26 197025 2044 524 34 1
27 57583 2042 502 33 -1
28 61784 2038 536 36 0
29 134236 2031 535 36 0
30 263408 1950 476 32 0
31 139567 1948 476 32 0
32 134863 1876 471 34 1
33 134341 1856 448 32 -1
34 134866 1822 445 32 0
35 52548 1790 446 33 2
36 262767 1787 455 34 2
37 264411 1784 426 31 -2
38 48326 1774 422 31 -2
39 132974 1731 432 33 1
40 15695 1686 368 28 -1
41 5639 1606 375 30 0
42 133676 1550 401 35 1
43 207620 1534 377 33 -1
44 7303 1494 346 30 0
45 136284 1462 356 32 0
46 262769 1461 358 32 0
47 7552 1431 342 31 1
48 3257 1413 317 29 -1
49 11971 1347 319 31 0