Block top - The block selection and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction range for that 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://checkbookmarks.com/story6149991/the-ultimate-guide-to-eth-blockchain-explorer-https-offersen-deleuran-3-technetbloggers-de-unlocking-clarity-method-of-blockchain-navigators-operate