Tool features
50 global resolvers
Live world map
Expected-value compare
Seven record types
What is DNS propagation & how it works
DNS propagation is the time it takes for a change to a domain's DNS records to spread across the thousands of DNS resolvers that make up the internet. When you update a record, such as pointing your domain to a new IP address or mail server, the change starts at your authoritative name servers and gradually reaches every recursive resolver as their cached copies expire.
Because each resolver caches records for the duration of their TTL, a change is never instant. This free DNS propagation checker queries 50 resolvers around the world at once and plots them on a live map, so you can see exactly where your new record has taken effect and where the old value is still being served.
How to use this tool
How to read your propagation results
Each resolver on the map is queried live and given one of three statuses. Enter an expected value in the settings to compare every location against it, or leave it blank to compare against the majority answer.
The resolver returned your expected value — or the majority answer when no expected value is set. This location is up to date.
The resolver still returns a different or older value. Your change has not reached this location yet, usually because a cache has not expired.
The resolver timed out or could not be reached. We automatically query a healthy substitute in the same region when one is available.
DNS record types you can check
Propagation applies to every record type. Check the one you changed to confirm the update has rolled out globally.
Maps a domain to an IPv4 address — the most common record to check after moving a site to a new server or host.
Maps a domain to an IPv6 address, the modern equivalent of an A record.
Points one hostname to another, often used for www and for CDN or SaaS endpoints.
Directs email to your mail servers. Check propagation after changing email providers.
Holds SPF, DKIM, DMARC and domain-verification strings used by email and third-party services.
Lists the authoritative name servers for a domain — these change when you switch DNS providers.
Declares which certificate authorities are allowed to issue TLS certificates for your domain.