DNS propagation
Check whether a changed DNS record has taken effect at Google, Cloudflare, Quad9 and AdGuard.
About this tool
When you change a DNS record, the change doesn't appear everywhere at once. Each DNS server caches the old response for as long as the record's TTL specifies, and only queries again after that.
The tool sends the same query to several major public DNS servers simultaneously and shows what each one returns. If they all agree, the change has propagated to those servers. If the responses differ, propagation is still in progress.
TTL is the number of seconds a server will cache the response. If a server is still showing the old value, you can see roughly how long it will be before it queries again.
Frequently asked questions
How long does DNS propagation take?
It depends on the old record's TTL. With a TTL of one hour, the change will have reached everywhere within an hour. Name server changes can take up to a couple of days.
Can I speed up propagation?
Not after the fact. If you're planning a migration, you can lower the TTL to a few minutes a day in advance, so the actual switch happens quickly.
Why do major services return different IP addresses?
Services like Google return different addresses depending on where the query originates. In that case, different responses are normal and not a sign that something is wrong.
Why am I still seeing the old page?
Your computer and router also cache DNS responses. Try restarting your browser, or test from your mobile on mobile data instead of wi-fi.