Block top - The block quantity and length in the blockchain (in blocks) on development of the present 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://bookmarkinglife.com/story5899680/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-bbs-pku-edu-cn-v2-jump-to-php-url-https-cryptoexplorerhub-com