Block top - The block number and length in the blockchain (in blocks) on development of the present 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://bookmarktune.com/story20127784/the-blockchain-explorer-usdt-trc20-diaries-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain