Block top - The block number and length with the blockchain (in blocks) on creation 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 actually be the 101st transaction submitted by this account) https://adsbookmark.com/story20796367/helping-the-others-realize-the-advantages-of-blockchain-explorer-one-https-mathiasen-curry-2-federatedjournals-com-diving-deep-blockchain-explorers