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 17315 98 1 1
1 45804 17287 -1 0 -1
2 58659 13783 100 1 0
3 5769 8922 -90 -1 0
4 52444 8542 0 0 0
5 52426 8090 143 2 0
6 52419 7307 137 2 0
7 22921 6141 -2 0 0
8 37455 6043 55 1 0
9 209 5214 -41 -1 0
10 27881 4658 -3 0 0
11 150008 4629 17 0 0
12 28100 4419 -1 0 0
13 174 4267 -61 -1 0
14 18229 3073 93 3 0
15 63526 2961 177 6 0
16 47849 2544 301 13 3
17 28058 2522 0 0 -1
18 29600 2448 1 0 -1
19 134236 2291 14 1 -1
20 262334 2048 981 92 38
21 197025 2047 2 0 1
22 134019 2047 -1 0 -2
23 57583 2047 1 0 -2
24 135125 2045 13 1 0
25 61784 2042 7 0 -2
26 56456 1980 0 0 -1
27 52468 1875 1 0 -1
28 19901 1871 7 0 -1
29 9534 1852 17 1 0
30 134863 1849 -7 0 -2
31 52864 1800 1800 0 0
32 48326 1776 3 0 -2
33 34984 1746 80 5 0
34 134866 1700 0 0 -3
35 37347 1600 -70 -4 -3
36 139567 1567 4 0 -2
37 137139 1528 379 33 17
38 58890 1513 19 1 -2
39 45235 1505 -1 0 -4
40 5639 1489 56 4 -1
41 134907 1442 2 0 -3
42 61689 1378 -27 -2 -2
43 135628 1360 -1 0 -2
44 136284 1347 -2 0 -2
45 4808 1347 -94 -7 -8
46 133711 1332 5 0 -2
47 18002 1327 20 2 -1
48 52752 1313 -5 0 -3
49 264100 1303 -3 0 -2