TTL (Time to Live)

Specifies how long the data package will be stored in the memory. After this time it will be removed from the memory to free up resources for other applications.

Internet service provider often save DNS records locally instead of transferring current data from the name server. This has the general advantage for Internet user that websites open faster and data transfer is reduced. Some providers ignore the TTL settings and update their memory only every two to three days.

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