What is DNS propagation?

DNS propagation is the time it takes for DNS changes to spread across global DNS servers. When you update a DNS record, the change needs to reach all resolvers worldwide – this typically takes 1-48 hours.

Why do some servers show different results?

Each DNS resolver caches records independently. Servers with stale caches will show old values until the TTL (Time-to-Live) expires. Lower TTLs mean faster propagation.

How long does DNS propagation take?

It depends on the TTL of the record. Most changes propagate within 1-4 hours. Records with high TTLs (e.g., 86400 = 24 hours) take longer.

Why is my website not updating after a DNS change?

Your browser and local DNS resolver cache old records. Try clearing your browser cache, flushing your OS DNS cache (ipconfig /flushdns on Windows, dscacheutil -flushcache on macOS), or wait for the TTL to expire.

How can I speed up DNS propagation?

Lower the TTL of the record before making changes – ideally to 300 seconds (5 minutes) at least 24 hours in advance. After the change is confirmed globally, you can raise the TTL back to a normal value.

All tools

DNS Propagation Checker

Check if DNS changes have propagated across global DNS servers. Verify updates from Google, Cloudflare, OpenDNS, and more.

Domain name

Record types

Propagation Results

Some DNS resolvers could not be reached. This may be due to network restrictions. Results from accessible resolvers are still accurate.

Other DNS Tools

DNS Lookup

Query DNS records for any domain. Check A, AAAA, MX, CNAME, TXT, NS, SOA, SRV, CAA, and PTR records.

SPF / DKIM / DMARC

Generate SPF and DMARC records and validate SPF, DKIM, and DMARC. Improve email deliverability and protect against spoofing.

WHOIS Lookup

Look up domain registration information. Find registrar, creation date, expiry date, nameservers, and contact details.

SSL Certificate Checker

Inspect SSL/TLS certificates. Check issuer, validity dates, subject alternative names, and certificate chain.

Blacklist Check

Check if an IP address or domain is listed on DNS-based blacklists (DNSBL). Test against Spamhaus, Barracuda, SpamCop, and more.

DNS Health Check

Run a comprehensive DNS health check on your domain. Analyze nameservers, SOA, MX, web records, and email authentication.

Frequently Asked Questions

: DNS propagation is the time it takes for DNS changes to spread across global DNS servers. When you update a DNS record, the change needs to reach all resolvers worldwide – this typically takes 1-48 hours.
: Each DNS resolver caches records independently. Servers with stale caches will show old values until the TTL (Time-to-Live) expires. Lower TTLs mean faster propagation.
: It depends on the TTL of the record. Most changes propagate within 1-4 hours. Records with high TTLs (e.g., 86400 = 24 hours) take longer.
: Your browser and local DNS resolver cache old records. Try clearing your browser cache, flushing your OS DNS cache (ipconfig /flushdns on Windows, dscacheutil -flushcache on macOS), or wait for the TTL to expire.
: Lower the TTL of the record before making changes – ideally to 300 seconds (5 minutes) at least 24 hours in advance. After the change is confirmed globally, you can raise the TTL back to a normal value.

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