Block top - The block range and length on the blockchain (in blocks) on creation of the present block Nonce - The transaction selection for that from address (Keep in mind this starts at 0 so a nonce of a hundred would basically be the a hundred and first transaction https://zbookmarkhub.com/story20385271/explorer-blockchain-base-an-overview-https-www-webwiki-co-uk-cryptoexplorerhub-com