Block top - The block selection and length from the blockchain (in blocks) on development of the current block Nonce - The transaction range with the from address (bear in mind this starts at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://dftsocial.com/story21625264/a-review-of-blockchain-explorer-xrp-https-graph-org-unveiling-transparency-how-blockchain-explorers-function-09-04