IPv6
The latest version of the Internet Protocol, using 128-bit addresses to support far more devices.
IPv6 (Internet Protocol version 6) is the successor to IPv4, designed to solve the address shortage. IPv6 addresses are 128 bits long (e.g., 2606:4700:4700::1111), providing a virtually unlimited number of unique addresses, enough for every grain of sand on Earth to have its own IP. IPv6 is being adopted gradually alongside IPv4. If your server supports IPv6, you should add AAAA records to your DNS so it is reachable on both protocols.
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