How do I flush Google's DNS cache?

Use Google's public Flush Cache page at developers.google.com/speed/public-dns/cache, entering the domain and record type.

How do I flush Cloudflare 1.1.1.1's cache?

Use Cloudflare's Purge Cache page at one.one.one.one/purge-cache.

How to flush a DNS cache

Q: How do I flush DNS on a Mac?

Run: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

A stale answer can be cached in several places at once: public resolvers, your ISP, your computer and your browser. Here is how to clear each one, and which ones can’t be cleared.

Public resolvers

Resolver	How
Google Public DNS (8.8.8.8)	Flush cache page: enter the name and record type.
Cloudflare (1.1.1.1)	Purge cache page: takes a few seconds to reach every data center.
OpenDNS (208.67.222.222)	CacheCheck: shows what OpenDNS serves and lets you refresh it.
Quad9, ISPs, most others	No public purge. You wait out the TTL.

Purges work one name and one record type at a time. If you changed several subdomains, purge each one.

Your computer

macOS

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

Windows

ipconfig /flushdns

Linux with systemd-resolved

resolvectl flush-caches

Your browser

Chrome and Edge keep their own cache. Open chrome://net-internals/#dns (or edge://net-internals/#dns) and choose “Clear host cache”. Firefox: about:networking#dns, then “Clear DNS Cache”.

Servers and clusters

Kubernetes: CoreDNS caches answers (30 seconds by default on many clusters). Restarting the CoreDNS pods clears it.
AWS VPC resolver: there is no way to flush it. Instances get its cached answers until they expire.
Applications: long-running processes often resolve once and hold the address in connection pools. Restarting them can matter more than any DNS flush.

Check a domain now.

See what Google, Cloudflare, OpenDNS, Quad9 and major ISPs are serving, how long each will cache it, and the registry status.

Open the checker

More guides: How long DNS propagation takes · clientHold and serverHold