Can you guess them? OK, .com as #1 is a no-brainer. How about the other nine? OK, here they are, in order from #1 to #10: Spoiler .com .tk .de .net .cn .uk .org .ru .nl .info (from Verisign's Domain Name Industry Brief for March 2015) By the way, the first .com was symbolics.com in 1985. Happy 30th birthday!