Free Tools
IP Blocklist Check
Checks one public IPv4 address against Spamhaus and reports current, provider-specific listing evidence -- SBL, CSS, XBL, DROP, and PBL. This tool does not determine whether an IP address is safe or trustworthy.
This check sends the IP address to the configured blocklist provider to retrieve current listing evidence. Collabovizion does not save lookup history, the IP is not included in the page URL, and no client-side storage is used.