# DNS Propagation Checker

See whether a DNS change has reached the world: the same question to 12 public resolvers and the authoritative nameserver, side by side, with how long the old answer stays cached.

Canonical: https://tamperbox.dev/dns-propagation

Reviewed: 2026-10-14

## Capabilities and processing

Enter a domain and pick a record type. Our server asks twelve public resolvers and the authoritative nameserver, and the page compares every answer with the authoritative one.

The report shows differing answers, observed TTLs and individual resolver errors. Differences can reflect caching, geo-routing or filtering; TTLs do not establish a deadline for global convergence.

## Example workflow

On the sample domain, the address changed 40 minutes ago and three resolvers still hold the old one.

## Limits and interpretation

Most public resolvers are anycast: they answer from the site nearest to our server, so a visitor elsewhere may reach a different cache. Nothing can clear another resolver’s cache. Nothing is stored.

## Related tools

[All tools](https://tamperbox.dev/) · [Privacy](https://tamperbox.dev/privacy)