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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 22 January 2020 the world's worst botnet infected Autonomous System Numbers are:
1
AS4134
China Telecom (ChinaNet)
Number of Bots: 727628

2
AS45609
Bharti Airtel Ltd. AS for GPRS Service
Number of Bots: 647336

3
AS45899
VNPT Corp
Number of Bots: 394795

4
AS16509
AMAZON-02
Number of Bots: 380499

5
AS9829
National Internet Backbone
Number of Bots: 356111

6
AS36947
Telecom Algeria
Number of Bots: 285355

7
AS4837
CHINA UNICOM China169 Backbone
Number of Bots: 244872

8
AS14618
AMAZON-AES
Number of Bots: 237442

9
AS8452
TE-AS
Number of Bots: 236559

10
AS45595
Pakistan Telecom Company Limited
Number of Bots: 236085

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