IP & domain blocklists
Ready-to-use blocklists for firewalls and security tools. Auto-updated every 15 minutes with curated threat data.
See what's actively being blocked across our customer network right now.
No credit card required. Instant access to full datasets.
1M+
Active IOCs
15min
Updates
8+
Categories
<0.01%
False Positive
Everything you need to protect your infrastructure and users
Malicious IPs including C2, scanners, and botnets.
Phishing, malware, and spam domains.
Choose specific threat types to block.
Lists refresh every 15 minutes automatically.
Text, JSON, CSV, and vendor-specific formats.
10K, 100K, or 1M entries based on your needs.
How security teams use this tool
Block malicious traffic at the perimeter.
Block access to malicious domains.
Filter traffic through web proxies.
Block emails from malicious IPs/domains.
Join thousands of security teams using isMalicious to protect their infrastructure.