Block top - The block amount and size on 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://nimmansocial.com/story10409347/5-simple-statements-about-blockchain-explorer-solana-explained-https-telegra-ph-blockchain-trackers-the-key-to-grasping-copyright-transactions-09-04