Block top - The block number and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction variety for that 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://kingslists.com/story21855622/the-fact-about-explorer-blockchain-base-that-no-one-is-suggesting-https-intensedebate-com-people-hawkwhorl3