Blacklist Checker
Check an IP address against 28 email and network blocklists.
IP Blacklist Lookup
Examples:
How to use
- Enter a public IPv4 address or hostname.
- Click Check Blacklists.
- Wait while the IP is checked against 28 blocklist providers.
- Review any listings, provider availability and removal links.
Frequently Asked Questions
What is an IP blacklist?
An IP blacklist is a database of IP addresses associated with spam, malware, abuse, compromised systems or policy violations.
Does one blacklist listing mean my email will go to spam?
Not necessarily. The impact depends on the blacklist, the receiving provider and your overall sender reputation.
Why does a provider show as unavailable?
Some blacklist providers restrict public DNS queries, require registration or temporarily fail to answer.
Can I enter a domain?
Yes. The tool resolves the hostname to a public IPv4 address before performing the blacklist checks.
