Name Service (or ENS),.eth domains ranging between 0000 and 9999 have been causing a stir with nonfungible token investors, speculators, and enthusiasts. Even though three- and four-digit names have been around for years, the number of people registering for ENS domains and purchasing these digit number names on secondary markets over the past week has significantly affected the market’s trading volume.

AccordingA Dune Analytics dashboard shows that the sales spike began April 21st, and there was an increase in the number of eth. Name registrations rose from 2,721 Ether to 21,188 on Thursday. Over the last seven-day period, ENS domains’ trading volume on OpenSea climbed by 3,333% to 2,613 Ether (ETH(or $7.3 million as of the writing). The last 48 hours have seen the most ENS NFT trading in the secondary market, with the most expensive domain so far, “555.eth,” selling for 55.5 ETH, or $156,821.91 on Thursday.