Block top - The block variety and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction range with the from address (bear in mind this starts at 0 so a nonce of 100 would in fact be the a hundred and first transaction https://get-social-now.com/story6086298/not-known-details-about-blockchain-explorer-usdt-trc20-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers