Malware Distribution by Autonomous System
Safe Browsing scans millions of websites to identify those sites that install malware without a user's knowledge. We discover and categorize these sites by autonomous system (AS) numbers, thousands of which exist on the Internet.
This data is part of our effort to support a safer and more secure web. By sharing information from our scans, we hope to encourage cooperation among those who battle malware. See our FAQ for more about Google’s efforts to help networks combat malware.