Block top - The block range and duration of the blockchain (in blocks) on development of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://mypresspage.com/story5584315/the-definitive-guide-to-explorer-blockchain-ethereum-https-wikimapia-org-external-link-url-https-cryptoexplorerhub-com