Block top - The block number and length from the blockchain (in blocks) on development 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://socialbraintech.com/story5316254/a-review-of-blockchain-explorer-xrp-https-gaiaathome-eu-gaiaathome-show-user-php-userid-1577569