Block top - The block number and length from the blockchain (in blocks) on development of the current 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://letsbookmarkit.com/story20331249/blockchain-explorer-search-an-overview-https-lamptie2-bravejournal-net-beyond-these-blocks-discovering-the-realm-of-distributed-ledger-explorers