xkv.org
X and K rarely appear together in English, which is exactly why this string is uncontested. Rarity in letter combinations translates directly into rarity in competition.
There’s no organisation with a prior claim to XKV, no established brand to be confused with, and no crowded search results to fight through. For a body whose initials match, this is simply the correct address. For anyone else, it’s a distinctive mark with the institutional tone that the .org carries.
The hard, technical sound suits engineering bodies, standards work and technical publishing more than a consumer brand. That’s a narrowing, and it points straight at the buyers who care most about a short permanent address: the ones printing it on specifications, certificates and conference material for decades.
Three characters, no hyphen, no digit, nothing to spell out twice.
The name is listed. Offers welcome.