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The Top 10 Worst

The World's Worst Botnet ASNs

Autonomous System Numbers (ASNs) in this chart have the highest number of detected spam-bots as listed in the Spamhaus XBL zone, sorted by ASN. See one of the below links for a definition of ASN. Most bots can be used for spam, phishing, click-fraud, DDoS and other malicious activities.

Many issues may relate to a country's bot density including technical, policy and socioeconomic factors.

Additional and more detailed statistics can be found at the Spamhaus CBL website:

CBL breakdown by ASN

CBL breakdown by ASN Traffic

CBL breakdown by ASN Infections


Source: Spamhaus (XBL) database. Data is compiled automatically every 24 hours from the XBL database using the number of currently listed bots for each network (ISP/NSP).
The 10 Worst Botnet ASNs
As of 01 April 2020 the world's worst botnet infected Autonomous System Numbers are:
1
AS4134
China Telecom (ChinaNet)
Number of Bots: 953889

2
AS8452
TE Data, SAE
Number of Bots: 863747

3
AS45609
Bharti Airtel Ltd. AS for GPRS Service
Number of Bots: 798034

4
AS45899
VNPT Corp
Number of Bots: 449200

5
AS36947
Telecom Algeria
Number of Bots: 409532

6
AS4837
CHINA UNICOM China169 Backbone
Number of Bots: 299773

7
AS9829
National Internet Backbone
Number of Bots: 295099

8
AS7713
PT Telekomunikasi Indonesia
Number of Bots: 256244

9
AS7552
Viettel Group
Number of Bots: 234778

10
AS45271
Idea Cellular Limited
Number of Bots: 225964

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