IPQS IP Address Block List is a threat intelligence service that provides IP address blocklists for identifying and blocking fraudulent connections. The service maintains databases of IP addresses associated with fraudulent activity, including proxies, VPNs, TOR nodes, residential proxies, botnets, and abusive connections. The service updates its blocklists in real-time, adding IP addresses when users engage in fraudulent activities such as fake registrations, chargebacks, fraudulent clicks, account takeover, web attacks, scraping, and malware distribution. The blocklists are designed to detect connections from high-risk sources including virtual machines, RDP connections, and residential addresses that allow tunneling from high-risk countries. IPQS collects data through honeypots, traps, and partner networks to identify malicious connections. The service provides IP reputation scoring for both IPv4 and IPv6 addresses, with risk assessments that predict whether users will engage in malicious behavior. The blocklists can be accessed through multiple methods including API, plugins for popular frameworks, or downloadable databases for local processing. The service offers bot detection capabilities, identifying IP addresses associated with scripted attacks, automated behavior, and virtual devices. The bot IP blocklists update every minute with new abusive IP addresses. Organizations can use these blocklists to implement IP filtering at the firewall, htaccess, iptables, or similar filtering mechanisms to prevent fraudulent users from accessing their systems.