Block height - The block number and length of the blockchain (in blocks) on generation of the current block Nonce - The transaction quantity for your 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://webcastlist.com/story21802768/the-smart-trick-of-explorer-blockchain-ethereum-that-nobody-is-discussing-https-www-instapaper-com-p-16864836