Common questions about RBL monitoring answered.
RBL monitoring checks your IP addresses and domains against commonly used blocklists and alerts you immediately when listed.
Yes. Our Free plan lets you monitor 1 host indefinitely. Learn more about the free plan
We accept all major credit cards and PayPal. Billing is automatic and can be cancelled anytime. View supported payment methods
Ultimate is a pay-per-check model. Monitor unlimited hosts by adding credits to your account. View more details here.
Real-time Blocklists (RBLs) are DNS-published lists of IP addresses linked to spam or malware. URIBLs are the same but list domain names instead of IPs.
Hundreds of sources including Spamhaus, Barracuda, SORBS, and premium threat intelligence from Facebook Threat Exchange, PhishTank, and Project Honey Pot. View the complete list
Cross-referencing multiple sources reduces false positives. Anti-flapping prevents alerts from temporary listings. Geographic checks from multiple locations catch regional-only listings. Read about our accuracy methodology
No, but our alerts include which blocklist flagged you, why you were listed, and removal instructions.
Email, SMS, Slack, Discord, Telegram, PagerDuty, webhooks, and more. View all notification options
Generator Labs is purpose-built for continuous blacklist monitoring with a free tier, full IPv6 and domain coverage, and a real REST API. We have detailed comparisons against the popular alternatives: vs. MxToolbox and vs. HetrixTools.
Our support team is ready to help.