Block top - The block range and duration of your blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (bear in mind this begins at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://sound-social.com/story10951877/the-definitive-guide-to-explorer-blockchain-ethereum-https-www-instapaper-com-p-16864836