About block 921,221
Bitcoin block 921,221 was mined by Foundry USA on October 28, 2025 at 7:08 PM UTC, 3 min 35 s after block 921,220. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 4,522 transactions in 1.71 MB (99.8% of the 4 million weight-unit limit). The median transaction paid 0.00 sat/vB, down from 1.00 sat/vB in the block before, and all fees added up to 0.0124 BTC. With the 3.125 BTC subsidy of halving era 5, Foundry USA earned 3.1374 BTC for this block.
Block 921,221 is number 1,926 of 2,016 in difficulty epoch 456; 90 blocks remain until the next difficulty adjustment at block 921,311. The next halving is at block 1,050,000, 128,779 blocks after this one.
Its hash starts with 20 zeros: that is the proof of work, a number below the target that the whole network’s hashrate had to search for. Foundry USA found 262 blocks in the week before. Today the block has 52,295 confirmations, so it is settled beyond any practical doubt.