List of different unknown mining pools
Source: https://btc.bitaps.com/blocks
blockchain.com mentioned unknown for block 649390
Whereas btc.bitaps.com shows &quot;Huobi&quot; as mining pool for the same block: https://btc.bitaps.com/649390
Coinbase text: =h_HZ/HuoBi/mmwta@F,Cn3ǐIK(