我的 IP 地址是什么？

224.0.0.0/4 23 October 2026

The multicast space (RFC 5771): 224.0.0.0 through 239.255.255.255. A datagram sent to a multicast address is delivered to every host that has joined the group, which is how one sender reaches many receivers without knowing who they are.

Source: IANA IPv4 Multicast Address Space Registry (RFC 5771)

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