Domain Blacklist & Reputation Checker

Check if your domain appears on major DNS-based blacklists that can harm your email deliverability or sender reputation. We query multiple public blocklists to help you identify and fix deliverability issues before they impact mail flow. Read the guide.

🔒 Privacy guaranteed. We never store your lookups.

Get told when reputation changes

All features

Website Signals

Watch the website itself for distress. Downtime, an expired certificate, or a redirect to a new brand often shows up months before a name reaches the open market.

Complete Monitoring

All of the above on one watch: registration data, website health, auctions, marketplaces, and drop timing, at 20+ checks a day per domain.

More free domain tools

All tools

WHOIS and RDAP Lookup

Registrar, registrant, expiration, and name server data straight from the public record.

SPF, DKIM and DMARC Checker

Validate the DNS records that decide whether your mail reaches the inbox.

Renewal Cost Checker

Compare registration, renewal, and transfer pricing before you commit.