Block top - The block selection and length from 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 really be the 101st transaction submitted by this account) https://allkindsofsocial.com/story5579244/explorer-blockchain-things-to-know-before-you-buy-https-urlscan-io-result-0199164a-7dbe-7737-944c-199699cc315c