Block top - The block number and length in the blockchain (in blocks) on development of the current block Nonce - The transaction range with the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://highkeysocial.com/story5846528/what-does-eth-blockchain-explorer-mean-https-writeablog-net-storeformat0-blockchain-in-the-microscope-exploring-the-unsung-resources