Block top - The block number and size on the blockchain (in blocks) on generation 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 actually be the 101st transaction submitted by this account) https://prbookmarkingwebsites.com/story25985716/the-ultimate-guide-to-eth-blockchain-explorer-https-www-webwiki-ch-cryptoexplorerhub-com