BIP110 activation tracker
Mandatory signalling (version bit 4) begins at block 961,632.
This page is static and permanent: your browser measures the last 144 blocks directly from the
mempool.space API — nothing is precomputed or served fresh by me.
After 961,632 the number that decides the fork is not the signalling percentage but the consecutive streak from the
boundary: an enforcing node rejects the first non-signalling block and everything built on it. This page measures that streak.
Chain tip
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fetching
Activation
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Signalling, last 144 blocks
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Pools signalling
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Loading block data…
Last 144 blocks, newest first — blue = signals bit 4
signals BIP110 does not signal at or after block 961,632
By pool (last 144 blocks)
| Pool | Signalling / total | Share of pool's blocks |
|---|
Did the chain split? — four independent sources, checked in your browser
Checking…
| Source | Tip height | Tip hash | Status |
|---|
Each source is a separate node operator with its own view of the chain. Same height + same hash = same chain.
A source a block or two behind is normal; it is only a split if the same height carries a different hash
(checked against mempool.space's block at that height). Blockchair reports a block count, shown here as count − 1 = height.
Note: a BIP110-enforcing node showing a lower tip than these is not a split of this chain — it is the enforcing chain above, frozen on purpose.
Context (fixed reference points, measured 2026-08-08 09:36 UTC)
432-block pre-activation window: 11/432 = 2.5% signalling — all OCEAN, which signalled in 11 of its own 16 blocks (69% of templates; Datum miners choose their own).
testnet4: 0/288 — no rehearsal anywhere.
Method: version bit 4 sits outside the BIP320 rolling mask, so setting it is deliberate.