DNS Propagation Time: How Long Until Your DNS Change Goes Live?
Understand DNS propagation time and the factors influencing how quickly DNS changes take effect.
DNS propagation time refers to the duration between updating a DNS record and when all users see the new record. This time varies based on the TTL (Time to Live) value, the caching policies of DNS resolvers, and geographical factors. For instance, Google DNS users may see the change in 60 seconds, while Deutsche Telekom users may wait up to 24 hours.
DNS operates as a query-based system rather than a push protocol. When a record is updated, the authoritative nameserver does not notify anyone; instead, resolvers query for the new record when their cache expires. Therefore, effective planning for DNS changes is crucial.