IP Blacklist Check — is Your IP Blocked?

The 101IP IP Blacklist Check tool verifies your IP address against 12+ major spam databases and blacklists (DNSBL), including Spamhaus, SpamCop, SORBS, Barracuda and others.

Why check your IP in blacklists?

• email delivery problems — your emails may go to spam if your IP is listed;
• diagnosis of mail server configuration issues;
• checking hosting servers and VPS for spam activity;
• verifying that your IP was removed from a blacklist after delisting.

Which blacklists does 101IP check?

• Spamhaus ZEN — the most authoritative anti-spam blacklist;
• SpamCop BL — spam reports from real users;
• SORBS DNSBL — broad list with multiple categories;
• Barracuda Reputation — used by email security systems;
• UCEPROTECT, Blocklist.de, NiX Spam, WPBL, PSBL and others.

How to remove your IP from a blacklist?

Each blacklist has its own delisting procedure. Usually you need to: eliminate the spam/abuse source on your server, then submit a delisting request via the blacklist's official website. Most listings expire automatically after 1–30 days if the spam activity stops.

Bookmark 101IP and use our free IP blacklist check to monitor your IP reputation.