Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction range with the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://bookmark-vip.com/story20342419/explorer-blockchain-base-an-overview-http-pandora-nla-gov-au-external-html-link-https-cryptoexplorerhub-com