We are out of 4-letter .com domainsWe are out of 4-letter .com domains Back in December 2013, we used our domain availability API to check all the combinations for 4-letter .com domains. For example AAAA.COM AAAB.COM AAAC.COM AAAD.COM up to…. ZZZX.COM ZZZY.COM ZZZZ.COM All the 4-letter com domains are registered What we confirmed is that all the 4-letter domains are registered. We haven’t tried numbers, dashes, or IDNs, just 26 let
