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 (bear in mind this starts at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://thebookmarkage.com/story20218490/what-does-blockchain-explorer-usdt-mean-https-500px-com-p-barrkijrooney