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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 02 March 2021 the world's worst botnet infected ISPs are:
1 Number of Bots: 739411

2 Number of Bots: 405271

3 Number of Bots: 391679

4 Number of Bots: 295971

5 Number of Bots: 292167

6 Number of Bots: 186821

7 Number of Bots: 139069

8 Number of Bots: 138592

9 Number of Bots: 124685

10 Number of Bots: 120435

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