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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
chinanet.cn.net Number of Bots: 739411

2
vnnic.net.vn Number of Bots: 405271

3
airtel.in Number of Bots: 391679

4
rr.com Number of Bots: 295971

5
cnc-noc.net Number of Bots: 292167

6
algerietelecom.dz Number of Bots: 186821

7
telkom.co.id Number of Bots: 139069

8
zvi.ru Number of Bots: 138592

9
amazon.com Number of Bots: 124685

10
chinamobile.com Number of Bots: 120435

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