SecNow!

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 4812 16559 -349 -2 0
1 5769 12626 -8 0 0
2 174 11548 838 8 0
3 52426 8182 3694 82 2
4 52444 7683 3676 92 2
5 52419 7321 950 15 -2
6 45804 5043 -20 0 -2
7 150008 3669 -14 0 0
8 209 3407 -3 0 1
9 63526 3394 -110 -3 -1
10 55666 3192 566 22 3
11 58659 3189 66 2 -1
12 53213 3072 686 29 5
13 53079 3072 1330 76 17
14 18747 3060 70 2 -3
15 271779 2924 335 13 -1
16 15924 2876 32 1 -4
17 133279 2566 19 1 -2
18 29600 2438 11 0 -2
19 262773 2344 -15 -1 -1
20 262334 2046 669 49 20
21 27926 2045 667 48 18
22 134236 2027 130 7 3
23 134294 1987 -41 -2 -4
24 135223 1976 8 0 0
25 18229 1948 -21 -1 -2
26 135244 1848 -46 -2 0
27 134863 1842 -7 0 0
28 3257 1813 86 5 3
29 135125 1787 -228 -11 -8
30 56268 1770 1 0 -2
31 58495 1746 -1 0 -2
32 132535 1730 -292 -14 -12
33 134866 1693 -21 -1 -1
34 48326 1606 143 10 2
35 45235 1539 11 1 0
36 133283 1514 -59 -4 -2
37 37347 1514 -88 -5 -4
38 134019 1446 15 1 0
39 34984 1441 -6 0 -2
40 52830 1383 371 37 29
41 135628 1359 9 1 0
42 133676 1319 4 0 1
43 136284 1295 3 0 1
44 18002 1278 26 2 1
45 24532 1264 -77 -6 -3
46 135777 1211 1 0 0
47 58890 1145 -23 -2 0
48 138235 1122 1 0 0
49 61689 1106 624 129 189