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Free Online Tools for Looking Up Potentially Malicious Websites

Several organizations offer free on-line tools for looking up a potentially malicious website. Some of these tools provide historical information; others examine the URL in real time to identify threats:

• AVG LinkScanner Drop Zone: Analyzes the URL in real time for threats
• F-Secure Browsing Protection: Presents historical reputation data about the website
• Finjan URL Analysis: Analyzes the URL in real time for threats
• KnownSec: Presents historical reputation data about the website; Chinese language only
• Norton Safe Web: Presents historical reputation data about the website
• ParetoLogic URL Clearing House: Looks up malicious sites discovered using a web honeypot; registration required
• PhishTank: Looks up the URL in its database of known phishing websites
• Malware Domain List: Looks up recently-reported malicious websites
• McAfee Site Advisor: Presents historical reputation data about the website
• McAfee TrustedSource: Presents historical reputation data about the website
• Trend Micro Web Reputation: Presents historical reputation data about the website
• Unmask Parasites: Looks up the URL in the Google Safe Browsing database
• URL Blacklist: Looks up the URL in its database of suspicious sites
• vURL: Retrieves and displays the source code of the page; looks up its status in several blocklists
• Web of Trust: Presents historical reputation data about the website; community-driven
• Wepawet: Analyzes the URL in real time for threats

Any on-line tools that should be on this list, but are missing? Let me know.

My other lists of on-line security resources outline Automated Malware Analysis Services and Blocklists of Suspected Malicious IPs and URLs.