DNS Propagation Monitor

Check whether a DNS change has reached public resolvers.

Run DNS-over-HTTPS checks from your browser, poll while this tab is open, save local history, and export a timestamped evidence summary for deploy notes.

Idle Enter a domain and expected record value, then run a check.
Resolver Status Observed answer Latency Checked
No resolver checks have run yet.

Resolver coverage

Checks Cloudflare, Google, Quad9, and AdGuard DNS-over-HTTPS JSON endpoints. Results can vary by resolver cache and record TTL.

Clear pass or mismatch

The expected value is normalized against resolver answers, so you can see which endpoints have the current DNS state.

Evidence for deploys

Copy a plain-text summary with timestamps, resolver names, status, answers, and latency for incident notes or customer support.

Local check history

Recent checks are stored only in this browser.

Evidence summary