Block top - The block variety and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction range for the from address (bear in mind this begins at 0 so a nonce of one hundred would essentially be the one hundred and first transaction https://social4geek.com/story6160369/not-known-details-about-blockchain-explorer-usdt-trc20-https-atavi-com-share-xftxdaz1pgsb4