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 19173 55 0 0
1 4812 16149 131 1 0
2 5769 9552 4 0 0
3 58659 8834 399 5 0
4 52444 8447 38 0 0
5 52419 7786 462 6 1
6 52426 7030 -1160 -14 -1
7 22921 6079 -65 -1 0
8 37455 5971 -54 -1 0
9 150008 5274 -17 0 0
10 209 4988 -20 0 0
11 27881 4650 -13 0 0
12 28100 4405 74 2 1
13 174 4002 -503 -11 -1
14 271779 3273 47 1 1
15 18229 3214 -32 -1 -1
16 63526 3126 -24 -1 0
17 53079 3046 -23 -1 0
18 47849 2522 -22 -1 0
19 28058 2503 -19 -1 0
20 29600 2442 -4 0 0
21 52864 2091 -12 -1 1
22 57583 2032 -15 -1 2
23 135125 2030 -15 -1 3
24 393489 2028 2028 0 0
25 262334 2026 -20 -1 0
26 134236 2018 32 2 1
27 61784 2011 225 13 3
28 134863 1852 2 0 0
29 37347 1840 143 8 4
30 48326 1774 -1 0 1
31 19901 1767 -21 -1 -2
32 134866 1708 0 0 0
33 136956 1608 63 4 3
34 134019 1605 -443 -22 -11
35 139567 1567 -1 0 0
36 135223 1547 -840 -35 -15
37 137139 1515 -4 0 0
38 58890 1502 -3 0 1
39 45235 1499 -7 0 -1
40 52468 1467 -106 -7 -6
41 5639 1461 24 2 0
42 18002 1442 0 0 -2
43 133676 1375 -1 0 2
44 3257 1358 -31 -2 -1
45 4808 1356 -29 -2 -1
46 135628 1350 -11 -1 0
47 4766 1343 -4 0 0
48 133711 1339 -2 0 1
49 52752 1312 -6 0 2