This tool allows you to check domains, IPs and subnets to see if they exist in the Spam.org Block List (SOBL) or the Spam.org Complaint List (SOCL). We recommend that you check out the glossary to learn about our lists and how they work.

IP or /CIDRDomain

Convert IP to /24 and check the entire range

Group range lookups together instead of showing individual IPs

Hide records with no complaints

You can submit up to 1,000 records at a time. CIDR below /8 will be ignored. All lookups are private and not cached.

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