Block height - The block amount and size on the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://livebackpage.com/story5925709/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-urlscan-io-result-0199164a-7dbe-7737-944c-199699cc315c