Block top - The block selection and length from 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 really be the 101st transaction submitted by this account) https://socialmediastore.net/story21465266/explorer-blockchain-base-an-overview-https-mathiasen-curry-2-federatedjournals-com-diving-deep-blockchain-explorers