DNSBL reputation
SEO page with a cached DNS blocklist reputation check for an IP or domain.
Summary
Clean
Input
bt.pf
Target type
domain
Domain
bt.pf
Warnings
Spamhaus DBL
dbl.spamhaus.org
Target
bt.pf
SURBL Multi
multi.surbl.org
Target
bt.pf
SORBL RHSBL
rhsbl.sorbs.net
Target
bt.pf
Tool switcher
Same target (bt.pf) — open the next tool without retyping.
Practical guides for common Blacklist Checker tasks — DNS records, troubleshooting steps, and links to our free tools.
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How to check whether a public IP appears on DNS blocklists before mail or API traffic breaks.
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Online DNSBL lookup for IPs and domains with per-list breakdown.
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Student notes on Spamhaus ZEN responses and 127.0.0.x return codes.
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How to see if a domain is listed on DBL/SURBL-style lists before email campaigns.
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Check sending IP against DNSBL before blaming DNS or passwords.
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Why one DNSBL listing can reject mail and how to read multi-list reports.
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