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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 23 May 2017 the world's worst botnet infected Autonomous System Numbers are:
1
AS4134
CHINANET-BACKBONE No.31,Jin-rong Street, CN
Number of Bots: 749624

2
AS9829
BSNL-NIB National Internet Backbone, IN
Number of Bots: 567067

3
AS12389
ROSTELECOM-AS, RU
Number of Bots: 312345

4
AS45899
VNPT-AS-VN VNPT Corp, VN
Number of Bots: 219541

5
AS8167
Brasil Telecom S/A - Filial Distrito Federal, BR
Number of Bots: 173220

6
AS24560
AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services, IN
Number of Bots: 157003

7
AS4837
CHINA169-BACKBONE CNCGROUP China169 Backbone, CN
Number of Bots: 156649

8
AS22927
Telefonica de Argentina, AR
Number of Bots: 136245

9
AS17974
TELKOMNET-AS2-AP PT Telekomunikasi Indonesia, ID
Number of Bots: 104231

10
AS45609
BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
Number of Bots: 96923

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