Block top - The block number and length from 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 basically be the 101st transaction submitted by this account) https://bookmarkspecial.com/story20430269/blockchain-explorer-search-an-overview-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers