What is a reserved IP address?

What is a reserved IP address?



In the Internet addressing architecture, the IETF and the IANA have reserved various IP addresses for special purposes. These IP addresses may be used for maintenance of routing tables, multicast, operation under failure modes, or to provide addressing space for public, unrestricted uses.

Reserved IP Address 0.0.0.0/8
Used for broadcast messages to the current ("this") network.

Reserved IP Address 10.0.0.0/8
Used for local communications within a private network.

Reserved IP Address 100.64.0.0/10
Used for communications between a service provider and its subscribers when using a Carrier-grade NAT.

Reserved IP Address 127.0.0.0/8
Used for loopback addresses to the local host.

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