Development preview. dotbunker is still being built. Some of the data shown here, including registrar prices, is sample data and should not be relied on.

dns

dotbunker

SPF Checker

Find a domain's SPF record, expand every include, count the DNS lookups against the limit of ten, and flag syntax and policy problems.
devices

Runs in your browser

Your browser asks public resolvers and registries directly. The query never passes through dotbunker.

Data sources

DNS over HTTPS · Cloudflare · Google