Blacklist check
Domain Name System based block lists are used by some mail and security systems. This check looks up your current public Internet Protocol address via Cloudflare DNS-over-HTTPS against public lists (including Spamhaus Zen, Barracuda, and SORBS).
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DNSBL status
What this blacklist check does
DNS-based block lists (DNSBLs) are used by some mail servers and security systems to flag IP addresses associated with spam or abuse. This page looks up your current public IP via Cloudflare DNS-over-HTTPS against public lists including Spamhaus Zen, Barracuda, and SORBS.
A listing here does not mean every website will block you. It mainly matters for email delivery and some filtered networks.
If you appear on a list
Confirm you are not on a VPN or shared exit that inherited a bad reputation. Residential dynamic IPs are occasionally listed because a previous user of the same address triggered filters. Follow each list’s published removal / delisting process if you administer the IP.
Re-run the check after switching networks. Being listed does not shut off general web browsing by itself.
Learn more
Plain-language overview: DNS blacklists explained.
Get your related information
Frequently Asked Questions
What is a blacklist check?
A blacklist (or DNSBL) check looks up whether your public Internet Protocol address appears on public block lists used by some email and security systems. A listing can mean abuse, a shared Internet Protocol, or a false positive.
What if I am listed?
A listing does not always mean you did something wrong, shared IPs and noisy neighbors can trigger lists. Follow the list’s removal process if needed.
Which lists do you check?
We query common public Domain Name System-based block lists (DNSBLs) via Cloudflare DNS-over-HTTPS, including Spamhaus Zen, Barracuda, and SORBS. Your public Internet Protocol address is disclosed to those lookup services for this check. Coverage varies by list and can change over time.
Can a Virtual Private Network change blacklist results?
Yes. Results follow the public Internet Protocol address you present. A Virtual Private Network exit Internet Protocol address is checked instead of your home Internet Service Provider address.
Does being listed block all websites?
Usually not. Listings mainly affect email delivery and some security filters. Everyday web browsing is typically unaffected.