Blacklist (RBL) Checker
Check an IP or domain against the major email blacklists at once.
About the Blacklist (RBL) Checker
Query more than twenty widely used DNS blacklists — Spamhaus, SpamCop, Barracuda, SORBS, UCEPROTECT, SpamRats and others — for a mail server IP or a domain. Listings show the return code and the reason text the list publishes, so you know exactly why delivery is failing and where to request removal.
Popular uses
- rbl
- dnsbl
- blacklist check
- spamhaus
- ip blacklist
- email deliverability
Examples
Check an IP
203.0.113.10Output
Clean on 20 lists, listed on 1Keyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Frequently asked questions
Version 1.0.0 · Updated 2026-09-16 · Runs entirely in your browser