Block top - The block quantity and length with the blockchain (in blocks) on generation of the present block Nonce - The transaction number 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://webcastlist.com/story21598211/top-guidelines-of-eth-blockchain-explorer-https-www-webwiki-nl-cryptoexplorerhub-com