Block top - The block quantity and length in the blockchain (in blocks) on development of the present 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://greatbookmarking.com/story20746083/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers