Open the DNS Propagation Checker
Free DNS propagation checker. Query a domain's A, AAAA, MX, TXT, NS or CNAME records against Google Public DNS and Cloudflare 1.1.1.1 side by side to see.
- Free to use
- No signup
- Nothing to install
- Works in any modern browser
Your input
The actionA real example, step by step
Real data entered into the DNS Propagation Checker, one screenshot per step. Nothing is mocked up.
Open the tool
The DNS Propagation Checker opens ready to use, nothing to install or sign up for.
Enter your data
Real input used here: Domain name example.com.
Press Check propagation
The DNS Propagation Checker shows the result straight away, below the same form.
What is the DNS Propagation Checker?
After you change a DNS record — pointing a domain to a new server, adding an MX record, updating a TXT verification string — the change does not appear everywhere instantly. Every DNS resolver around the world caches answers for as long as the record's TTL allows, so different people can see the old and new values for hours or even days. This tool checks a domain's A, AAAA, MX, TXT, NS or CNAME record against two independent, globally distributed public resolvers at once — Google Public DNS and Cloudflare 1.1.1.1 — and shows the results side by side with a clear verdict on whether they agree.
Browsers cannot send the raw UDP DNS packets that a command-line tool like <code>dig</code> uses; instead this checker uses each provider's DNS-over-HTTPS (DoH) JSON API, the standard, secure way for a web page to query DNS directly from your browser. Because Google's and Cloudflare's resolver networks are each spread across dozens of physical locations worldwide and answer from whichever is nearest to the requester, agreement between these two large independent networks is a strong, real-world signal that a change has spread — this is what "propagation" means for a tool that runs in a browser rather than dialling into servers on every continent.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Google Public DNS and Cloudflare 1.1.1.1, queried at once.
A, AAAA, MX, TXT, NS and CNAME.
Instantly see whether the record has settled.
Understand how long a resolver may keep serving a cached value.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
Site owners after a server migration
Confirm a domain now points to the new host everywhere.
Try it freeEmail administrators
Check that a new MX or SPF TXT record has taken effect before troubleshooting delivery.
Try it freeDevelopers debugging DNS
See exactly what two major independent resolvers are currently returning.
Try it freeHow it compares
A plain look at this tool next to the usual alternative.
| This seo tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
Questions people ask
What does it mean if the two resolvers show different answers?
One of them is still serving a cached value from before your change. This is completely normal until the record's original TTL expires everywhere.
Why only two resolvers?
Google and Cloudflare are two of the largest, most widely used public resolver networks and both offer a browser-friendly DNS-over-HTTPS API with open CORS access; other providers were tested but do not reliably support direct browser requests.
How long does full propagation usually take?
Often minutes if the old TTL was short, but it can take up to 24–48 hours for records with long TTLs or certain registrar-level changes like nameserver updates.
Does this replace a command-line dig or nslookup?
For most everyday checks, yes — it queries the same global infrastructure. For raw protocol-level debugging, a command-line tool still offers more control.
Is my domain lookup private?
The query goes straight from your browser to Google's and Cloudflare's public DNS services; this site does not see or log it.
More free tools
Related to the DNS Propagation Checker.
Try the DNS Propagation Checker now
See if a DNS change has spread by comparing Google and Cloudflare's global resolvers side. Free to use.
Try it free