Co je propagace DNS?
Rozšíření změn do celé sítě (může trvat až 48 hodin).
Proč různé servery ukazují jiné hodnoty?
Server uchovává hodnotu v mezipaměti kvůli rychlejší odezvě až do vypršení TTL.
Propagace DNS
Ověřte, jak jsou DNS záznamy překládány ve světě.
DNS Propagation Checker monitors how DNS changes spread across global servers. Changes typically take 24-48 hours to propagate through the DNS infrastructure.
Key Facts
- DNS propagation affects 300+ million domains
- Default TTL is 3600 seconds (1 hour)
- Over 600 root server instances worldwide
- Lowering TTL before changes can reduce propagation to under 30 minutes
Frequently Asked Questions
How long does DNS propagation take?
Typically 24-48 hours, can range from minutes to 72 hours depending on TTL values and caching policies.
How to speed up propagation?
Lower TTL to 300 seconds 24-48 hours before changes. After propagation, increase back to 3600+.
What is DNS TTL?
Time To Live — how long DNS resolvers cache a record in seconds. TTL 3600 = 1 hour cache.
Can I force DNS propagation?
Cannot force globally. Flush local cache and use Google DNS (8.8.8.8) which updates faster.