What this check shows
DNS propagation describes the period during which recursive resolvers do not yet agree on a recently changed answer. It is driven mainly by caching and TTL values rather than a single synchronized global update.
This checker queries independent resolvers in parallel and highlights whether answers are consistent, partially propagated, absent or failing.
When to use it
- Nameserver or DNS provider migrations
- Website and CDN cutovers
- Email infrastructure changes
- Incident response and support evidence
How to read the result
- A mix of old and new answers normally indicates cached data that has not expired everywhere.
- SERVFAIL can point to broken delegation, unreachable authoritative servers or DNSSEC validation problems.
- A timeout from one resolver is less significant than the same failure across many independent providers.
Command examples
Use these dig commands when you need to compare DNSRadar with a terminal check or collect evidence for a DNS provider.
dig example.com A +short
dig @1.1.1.1 example.com A
dig @8.8.8.8 example.com A +noall +answerQuestions
Can DNS propagation be forced?
You generally cannot flush third-party recursive caches. Lowering TTL before a planned change can shorten the transition.
When is propagation complete?
For practical purposes, it is complete when the resolvers relevant to your users consistently return the intended answer.
Related DNS tools
Check DNS records worldwide across independent public resolvers for A, AAAA, CNAME, MX, TXT, NS, SOA, PTR, SRV and CAA answers.
Run a global A record lookup to check IPv4 addresses, TTL values and propagation across independent DNS resolvers.
Check AAAA records worldwide to verify IPv6 addresses, propagation, TTL behavior and resolver differences before or after a dual-stack change.
Check CNAME records worldwide, compare canonical targets across public DNS resolvers and detect stale aliases after CDN, SaaS or hosting changes.
Check MX records worldwide, compare mail server hostnames and priorities, and diagnose email delivery or migration issues across global DNS resolvers.
Check TXT records worldwide for SPF, DKIM, DMARC and domain verification, and compare long DNS text values across independent resolvers.