Block top - The block number and length from the blockchain (in blocks) on creation 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://bookmarkmoz.com/story20330253/explorer-blockchain-tron-an-overview-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain