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://kbookmarking.com/story20669653/a-review-of-blockchain-explorer-xrp-https-pad-geolab-space-1eemv59krmalavl2pdd7cg