Malicious IPs in South Korea

• Brute force sources in South Korea

  827 (78%)

  827 flagged networks, #4 of 159 countries for brute force sources. Sources of password guessing against SSH, mail, FTP and web logins. Brute Force Sources by Country

• Spam sources in South Korea

  143 (13%)

  143 flagged networks, #3 of 85 countries for spam sources. Sources of email spam. Spam Sources by Country

• Other malicious networks in South Korea

  64 (6%)

  64 flagged networks, #16 of 147 countries for other malicious networks. Addresses and ranges reported as malicious without a more specific category. Other Malicious Networks by Country

• Scanners in South Korea

  17 (2%)

  17 flagged networks, #12 of 44 countries for scanners. Hosts scanning or probing services on the internet. Scanners by Country

• Botnet hosts in South Korea

  9 (1%)

  9 flagged networks, #37 of 126 countries for botnet hosts. Infected hosts taking part in a botnet. Botnet Hosts by Country

• C2 servers in South Korea

  6 (1%)

  6 flagged networks, #16 of 52 countries for C2 servers. Command-and-control servers, payload hosts and other attacker-run infrastructure. C2 Servers by Country

Questions about South Korea

How many malicious IP addresses are there in South Korea?

On 2026-10-10, 1,066 IPv4 networks (/24 blocks) located in South Korea were flagged for malicious activity, with 2,762 listed IPv4 addresses. Each /24 counts once, however many of its addresses are listed.

Which networks in South Korea host the most flagged IPs?

KIXS-AS-KR-KR - Korea Telecom (AS4766, 828 networks), SKB-AS-KR - SK Broadband Co Ltd (AS9318, 46 networks), LGDACOM-KR - LG DACOM Corporation (AS3786, 36 networks). Large hosting providers appear because attackers rent their servers, not necessarily because of the operator.