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network-programmingip-address

example.com is OK for domain example, what is example IP Address?

We use the example.com often for domain name reference. I wonder if any IP address used as an example IP address to mention in references like tutorial or notes?. I knew the loop back interface 127.0.0.1 can be used but it has been known for local system always.

Can example.com IP Address used for this purpose legally?

Solution

  • From RFC 5737

    The blocks 192.0.2.0/24 (TEST-NET-1), 198.51.100.0/24 (TEST-NET-2), and 203.0.113.0/24 (TEST-NET-3) are provided for use in documentation.

    From RFC 3849

    IANA is to record the allocation of the IPv6 global unicast address prefix 2001:DB8::/32 as a documentation-only prefix in the IPv6 address registry. No end party is to be assigned this address.