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 in fact be the a hundred and first transaction https://bookmarkstime.com/story20846156/the-definitive-guide-to-explorer-blockchain-ethereum-https-diigo-com-010nvri