BIP 323: 24 nVersion bits for general purpose use

Specification, Draft. By Matt Corallo. First discussed on the list 28 Oct 2026; 3 threads and 3 messages in all.

In Bitcoin Core

First shipped in Bitcoin Core 32.0 .

BIP 9 bits 5 to 28 (inclusive) are ignored for soft-fork signalling and unknown soft fork warnings as of v32.0.

From Bitcoin Core's doc/bips.md.

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