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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 19 February 2019 the world's worst botnet infected Autonomous System Numbers are:
1
AS4134
No.31/Jin-rong Street
Number of Bots: 1098700

2
AS45609
Bharti Airtel Ltd. AS for GPRS Service
Number of Bots: 866730

3
AS9829
National Internet Backbone
Number of Bots: 823358

4
AS45899
VNPT Corp
Number of Bots: 433033

5
AS36947
Telecom Algeria
Number of Bots: 338490

6
AS27699
TELEFÔNICA BRASIL S.A, BR
Number of Bots: 313103

7
AS45595
Pakistan Telecom Company Limited
Number of Bots: 307273

8
AS8452
TE-AS
Number of Bots: 295811

9
AS4837
CHINA UNICOM China169 Backbone
Number of Bots: 290338

10
AS45271
ICLNET-AS-AP Idea Cellular Limited, IN
Number of Bots: 284298

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