Block top - The block number and length in the blockchain (in blocks) on development of the current block Nonce - The transaction range with the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://wildbookmarks.com/story20756014/the-fact-about-explorer-blockchain-base-that-no-one-is-suggesting-https-rentry-co-4vomqtzo