Block top - The block range and length of your blockchain (in blocks) on development of the present block Nonce - The transaction amount with the from address (Remember this starts off at 0 so a nonce of one hundred would truly be the 101st transaction submitted by this account) https://mylittlebookmark.com/story6309246/explorer-blockchain-base-an-overview-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers