DNS Propagation Checker Έλεγχος Διάδοσης DNS
See if your DNS change has propagated worldwide — check across 30+ resolvers in Europe, Americas, Asia and Africa with a live map.
Enter a domain and select the record type to check propagation across 32+ global resolvers.
What is DNS Propagation?
When you change a DNS record (e.g. an A record for a new IP, MX for a new mail server, NS when switching DNS providers), the change does not become visible everywhere at once. Each DNS resolver in the world caches the old value for as long as the record's TTL (Time To Live) dictates — until that cache expires, it keeps returning the old answer.
The DNS Propagation Checker queries your domain simultaneously across 30+ resolvers in Europe, Americas, Asia and Africa, and shows how many already see the new value.
What do the colours mean?
- ✓ Green — the resolver returns the same value as the majority (consensus).
- ⚠ Yellow — the resolver returns a different value — it still has old cache.
- ✗ Red — the resolver returned no answer or timed out.
Record types you can check
- A / AAAA
- IPv4 / IPv6 address — the most common: migrating to a new server.
- CNAME
- Alias to another domain — useful for subdomains (www, mail, cdn).
- MX
- Mail server — verify that a mail hosting change has propagated.
- NS
- Nameservers — takes longer (12–48h) because TLD root servers must be updated.
- TXT
- SPF, DKIM, DMARC, domain verification. Fast propagation (follows TTL).
- SOA
- Zone serial number — useful to confirm a zone transfer completed.
- CAA
- Authorized Certificate Authorities — which CAs are allowed to issue SSL for this domain.
When to use this tool
- After changing an A record: see whether Europe and the Americas already resolve the new IP.
- After moving to a new DNS provider: check when the NS records have propagated globally.
- After configuring MX: confirm emails will be delivered to the new server.
- Troubleshooting: user A sees the new site, user B doesn't — here you can see why.
Cache duration
Results are cached for 30 seconds. Refresh the page for a fresh real-time check.
Frequently Asked Questions
I see 100% propagation — does that mean everyone worldwide sees the new value?
It means the resolvers we checked all agree. It is not a guarantee for every ISP resolver globally — there are hundreds of thousands of them. However, if the major ones (Cloudflare, Google, Quad9, OpenDNS) all agree, 99%+ of users are already seeing the new value.
Why does one resolver show red while the rest show green?
That resolver still has the old value in cache. It will refresh automatically when the record's TTL expires. If your TTL is 86400 (24h) and you just changed DNS, it may take up to 24 more hours for that specific resolver.
My change shows on one record type but not another — why?
Each record type has its own TTL. For example, your A record might have TTL=300 (5 minutes) while your MX has TTL=86400. Check each record type separately.
The "Consensus" shows the old value — how?
The majority of resolvers still have the old value in cache. Propagation is in progress. Refresh in 15–30 minutes.