Malicious IPs in Czechia

• Brute force sources in Czechia

  23 (62%)

  23 flagged networks, #45 of 157 countries for brute force sources. Sources of password guessing against SSH, mail, FTP and web logins. Brute Force Sources by Country

• Botnet hosts in Czechia

  5 (14%)

  5 flagged networks, #54 of 120 countries for botnet hosts. Infected hosts taking part in a botnet. Botnet Hosts by Country

• Other malicious networks in Czechia

  4 (11%)

  4 flagged networks, #82 of 143 countries for other malicious networks. Addresses and ranges reported as malicious without a more specific category. Other Malicious Networks by Country

• C2 servers in Czechia

  3 (8%)

  3 flagged networks, #25 of 51 countries for C2 servers. Command-and-control servers, payload hosts and other attacker-run infrastructure. C2 Servers by Country

• Scanners in Czechia

  1 (3%)

  1 flagged network, #26 of 38 countries for scanners. Hosts scanning or probing services on the internet. Scanners by Country

• Spam sources in Czechia

  1 (3%)

  1 flagged network, #55 of 86 countries for spam sources. Sources of email spam. Spam Sources by Country

Questions about Czechia

How many malicious IP addresses are there in Czechia?

On 2026-10-12, 37 IPv4 networks (/24 blocks) located in Czechia were flagged for malicious activity, with 321 listed IPv4 addresses. Each /24 counts once, however many of its addresses are listed.

Which networks in Czechia host the most flagged IPs?

SAOCOMP-AS Radovan Ochvat trading as SAO Computers (AS197846, 4 networks), O2-CZECH-REPUBLIC O2 Czech Republic, a.s. (AS5610, 3 networks), M247 M247 Europe SRL (AS9009, 3 networks). Large hosting providers appear because attackers rent their servers, not necessarily because of the operator.