Block top - The block number and size in the blockchain (in blocks) on development of the present block Nonce - The transaction selection 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://altbookmark.com/story22255275/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-mathiasen-curry-2-federatedjournals-com-diving-deep-blockchain-explorers