IP blacklist checker

Direct answer:Query several public DNS blocklists and see which sources currently list an IPv4 or IPv6 address.

Query several public DNS blocklists and see which sources currently list an IPv4 or IPv6 address.

Blocklist results are snapshots. A listing is not a final deliverability verdict.

Frequently asked questions (FAQ)

Why can lists disagree?

Each operator has different data, policies and refresh times. Check the source list and re-test after remediation.