Block top - The block number and length from the blockchain (in blocks) on development of the present block Nonce - The transaction range with 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://crossbookmark.com/story20289189/explorer-blockchain-base-an-overview-https-heavenarticle-com-author-pathpastor4-452336