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 actually be the 101st transaction submitted by this account) https://myeasybookmarks.com/story6167376/how-much-you-need-to-expect-you-ll-pay-for-a-good-blockchain-explorer-litecoin-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers