DNSBL Blacklist Check
Enter an IPv4 address to see if it is listed on common DNS-based blacklists used by mail servers and firewalls.
Lists we check
zen.spamhaus.org — Spamhaus ZEN (SBL + XBL + PBL)
b.barracudacentral.org — Barracuda Reputation
bl.spamcop.net — SpamCop
dnsbl.sorbs.net — SORBS
cbl.abuseat.org — AbuseAt CBL
psbl.surriel.com — PSBL
db.wpbl.info — WPBL
Note: Some high-quality lists (including parts of Spamhaus) require a commercial agreement or specific authorization for production use.