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The Top 10 Worst

The World's Worst Botnet ISPs

ISPs in this chart have the highest number of detected spam-bots as listed in the Spamhaus XBL zone. 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 Domain

CBL breakdown by Domain Traffic

CBL breakdown by Domain 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 ISPs
As of 15 October 2019 the world's worst botnet infected ISPs are:
1
chinanet.cn.net Number of Bots: 1050963

2
airtel.in Number of Bots: 1046000

3
vnnic.net.vn Number of Bots: 947346

4
sancharnet.in Number of Bots: 650837

5
tedata.net Number of Bots: 573301

6
ptcl.net.pk Number of Bots: 324204

7
algerietelecom.dz Number of Bots: 309419

8
amazon.com Number of Bots: 308462

9
cnc-noc.net Number of Bots: 299591

10
irancell.ir Number of Bots: 282675

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