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 45804 17279 80 0 0
1 4812 16739 -352 -2 0
2 5769 9261 166 2 1
3 58659 8842 -4800 -35 -1
4 52419 6731 -369 -5 2
5 52426 6494 -1376 -17 0
6 209 5005 -37 -1 3
7 150008 4604 71 2 4
8 37455 4330 -1695 -28 0
9 174 4326 276 7 4
10 27881 4212 -450 -10 0
11 28100 3470 -948 -21 1
12 18229 3120 21 1 2
13 63526 3033 -6 0 3
14 52444 2901 -5573 -66 -10
15 52387 2686 2686 0 0
16 47849 2544 4 0 1
17 22921 2519 -3616 -59 -10
18 28058 2516 5 0 0
19 29600 2447 13 1 0
20 53079 2340 -732 -24 -5
21 134236 2291 1091 91 35
22 52864 2101 -3 0 -2
23 134019 2048 4 0 0
24 135125 2046 142 7 3
25 262334 2046 1 0 -3
26 57583 2045 122 6 0
27 61784 2024 -2 0 -3
28 52468 1883 225 14 6
29 9534 1851 48 3 0
30 56456 1813 -167 -8 -5
31 19901 1811 0 0 -3
32 37347 1789 9 1 -2
33 48326 1777 0 0 -2
34 134866 1682 -25 -1 -1
35 134863 1604 -169 -10 -3
36 136956 1595 258 19 15
37 137139 1531 2 0 0
38 58890 1520 98 7 4
39 139567 1506 -61 -4 -4
40 45235 1506 0 0 -2
41 52830 1484 -1 0 -1
42 3257 1414 -7 0 2
43 133676 1406 -28 -2 -2
44 5639 1374 -116 -8 -5
45 34984 1367 -178 -12 -9
46 61689 1366 -30 -2 0
47 4808 1366 28 2 3
48 18002 1365 -42 -3 -3
49 135628 1363 1 0 -2