Block top - The block quantity and length in the blockchain (in blocks) on development of the present block Nonce - The transaction selection 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://bookmarklinx.com/story20883890/everything-about-blockchain-explorer-https-pad-geolab-space-1eemv59krmalavl2pdd7cg