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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 04 December 2020 the world's worst botnet infected Autonomous System Numbers are:
1
AS4134
China Telecom (ChinaNet)
Number of Bots: 1147558

2
AS45609
Bharti Airtel Ltd. AS for GPRS Service
Number of Bots: 403215

3
AS4837
China Unicom
Number of Bots: 337067

4
AS36947
Telecom Algeria
Number of Bots: 162586

5
AS45899
VNPT Corp
Number of Bots: 146941

6
AS7713
PT Telekomunikasi Indonesia
Number of Bots: 143225

7
AS7552
Viettel Group
Number of Bots: 139001

8
AS5089
Virgin Media Limited
Number of Bots: 121574

9
AS45595
Pakistan Telecom Company Limited
Number of Bots: 116606

10
AS5607
Sky UK Limited
Number of Bots: 112759

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