Block top - The block number and length in the blockchain (in blocks) on development of the current 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://thebookmarklist.com/story20640435/explorer-blockchain-base-an-overview-https-forum-repetier-com-profile-coverjaguar3