What Is DNS Propagation?
When you update a DNS record — like pointing a domain to a new server's IP address — that change doesn't take effect everywhere instantly. DNS resolvers around the world cache records for a duration set by the TTL (Time To Live) value, so different resolvers may show the old or new value until their cache expires. This process of the new value spreading to every resolver globally is called DNS propagation, and it can take anywhere from a few minutes up to 48 hours.
How to Use This Tool
- Enter your domain name (e.g.
example.comorwww.example.com). - Choose the record type you want to check — A for IPv4 address, CNAME for aliases, MX for mail servers, etc.
- Click "Check Propagation" — the tool queries Google, Cloudflare, AdGuard and DNS.SB DNS in parallel.
- If all resolvers return the same value, your DNS has fully propagated. If they differ, propagation is still in progress.
Why Check DNS Propagation?
- After changing hosting providers — confirm your domain points to the new server everywhere before cancelling the old one.
- After setting up email (MX records) — verify mail routing has updated globally before relying on the new mail server.
- After domain verification (TXT records) — check that verification codes for Google Search Console, SPF/DKIM or other services are visible worldwide.
- After changing nameservers — confirm the new NS records have taken effect before troubleshooting other DNS issues.