Block top - The block variety and duration with the blockchain (in blocks) on generation 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 really be the 101st transaction submitted by this account) https://bookmarkpressure.com/story20531134/a-review-of-blockchain-explorer-usdt-https-gaiaathome-eu-gaiaathome-show-user-php-userid-1577569