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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 October 2017 the world's worst botnet infected Autonomous System Numbers are:
1
AS4134
CHINANET-BACKBONE No.31,Jin-rong Street, CN
Number of Bots: 1087130

2
AS45899
VNPT-AS-VN VNPT Corp, VN
Number of Bots: 224423

3
AS12389
ROSTELECOM-AS, RU
Number of Bots: 204984

4
AS9829
BSNL-NIB National Internet Backbone, IN
Number of Bots: 192654

5
AS4837
CHINA169-BACKBONE CHINA UNICOM China169 Backbone, CN
Number of Bots: 166868

6
AS45595
PKTELECOM-AS-PK Pakistan Telecom Company Limited, PK
Number of Bots: 116350

7
AS22927
Telefonica de Argentina, AR
Number of Bots: 115413

8
AS24560
AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services, IN
Number of Bots: 114847

9
AS45609
BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
Number of Bots: 104407

10
AS3462
HINET Data Communication Business Group, TW
Number of Bots: 92143

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