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Blacklist Lookup is an essential online tool for quickly determining whether an IP address, domain, or email appears on public blacklists and DNS-based blocklists (DNSBL/RBLs). Fast, accurate checks across multiple blacklist sources let you diagnose deliverability problems, investigate security incidents, and protect brand reputation — all from a single interface.
Email Marketers & ESPs: Troubleshoot bounced campaigns and restore sender reputation to improve inbox delivery.
IT & Sysadmins: Identify compromised mail servers or misconfigured systems that trigger blacklisting.
Security Teams & SOCs: Detect threat vectors and blocked indicators of compromise (IOCs) during incident response.
DevOps & Hosting Providers: Monitor server IPs and prevent service interruptions caused by blacklisting.
Webmasters & SEOs: Check domain reputation affecting search visibility and referral traffic.
Fraud Analysts & Compliance Officers: Verify suspected malicious infrastructure to block fraudulent activity.
Multi-source checks: Scan top DNSBLs, spam databases, and threat feeds in one go.
IP, domain & email support: Flexible queries to diagnose different reputation issues.
Real-time results: Immediate feedback to speed up remediation.
Detailed reports: View which lists flagged your asset and recommended next steps.
APIs & automation: Integrate checks into monitoring, ticketing, or CI/CD pipelines.
Actionable guidance: Steps for delisting, contacting list operators, and preventing re-blacklisting.
Being blacklisted can break email campaigns, disrupt services, and damage customer trust. Blacklist Lookup empowers teams to find the root cause quickly, fix configuration or security gaps, and restore reputation—minimizing downtime and protecting conversions.
Try Blacklist Lookup to diagnose reputation problems instantly and get clear, actionable steps to resolve them.
