IP Blacklist Check — Spamhaus & DNSBL Lookup

What does it mean if my IP is blacklisted?

DNS-based blocklists (DNSBLs) like Spamhaus, SpamCop, SORBS and Barracuda track IP addresses seen sending spam, running malware, or behaving abusively. Mail servers query these lists before accepting an email — if your IP is listed, your messages may be rejected or dumped in spam. Home users usually land on a list because malware on the network sent spam, or because the whole ISP range got flagged. This tool checks your IP against the major DNSBLs in real time.

FAQ

How do I get my IP removed from a blacklist?

First fix the cause — scan for malware, secure any mail server, stop whatever triggered the listing. Then go to the specific blocklist’s site (for example check.spamhaus.org) and use its delisting/removal form. Most reputable lists remove a clean IP within hours to a few days. Never request delisting before fixing the problem, or you’ll be relisted.

Why is my email going to spam?

A blacklisted sending IP is one of the top reasons, but not the only one: missing or wrong SPF, DKIM and DMARC records, a poor domain reputation, or spammy content also push mail to the spam folder. Start by confirming your IP is clean here, then check your email authentication records.

Which blacklists does this tool check?

It queries the major, widely-trusted DNSBLs including Spamhaus ZEN, SpamCop, SORBS and Barracuda. These are the lists mail providers actually use, so a clean result here reflects the checks that matter for real email delivery.

Can I be blacklisted through no fault of my own?

Yes. If your ISP assigned you an IP that a previous user abused, or lists your whole range for its neighbours’ behaviour, you can inherit a listing. In that case contact your ISP — individual users often can’t delist a shared or dynamic address themselves.