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://friendlybookmark.com/story20300430/5-tips-about-blockchain-explorer-you-can-use-today-https-mathiasen-curry-2-federatedjournals-com-diving-deep-blockchain-explorers