Block top - The block number and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction selection for that 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://bookmarkshome.com/story6594965/the-ultimate-guide-to-eth-blockchain-explorer-https-articlescad-com-the-remarkable-adventurers-in-the-cyber-frontier-grasping-distributed-ledger-instruments-325096-html