TTL (Time To Live)
TTL is a value in a DNS record that determines how long servers should cache the information before checking for updates.
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In plain English
How long other servers are allowed to “remember” your DNS answer before they have to ask again. Short TTL = changes spread faster; long TTL = less load, slower updates.
TTL (Time To Live) is measured in seconds. If a record has a TTL of 3600, other servers will store that information locally for 1 hour. Lowering TTL before a site migration helps ensure that changes take effect faster across the globe.
High TTL values reduce server load and improve speed but make it harder to react quickly to server changes. Most providers use a default between 300 (5 mins) and 86400 (24 hours).
Examples & Usage
Standard TTL Values
60 (1 min) - Rapidly changing records
3600 (1 hour) - Standard / Balanced
86400 (24 hours) - Static / Stable records