Block top - The block number and length from the blockchain (in blocks) on development of the current block Nonce - The transaction variety for that 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://bookmarkgenius.com/story20380095/blockchain-explorer-usdt-trc20-fundamentals-explained-https-wikimapia-org-external-link-url-https-cryptoexplorerhub-com