Block top - The block range and length from the blockchain (in blocks) on development of the current block Nonce - The transaction number with the from address (Remember this starts at 0 so a nonce of a hundred would in fact be the 101st transaction submitted by this account) https://userbookmark.com/story20545544/blockchain-explorer-fundamentals-explained-https-forum-issabel-org-u-optionray7