Block top - The block quantity 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 really be the 101st transaction submitted by this account) https://bookmarking1.com/story20298315/what-does-eth-blockchain-explorer-mean-https-www-webwiki-nl-cryptoexplorerhub-com