Three letters on the .org, using characters that almost never appear together. That rarity is the appeal. There’s no existing organisation with a strong claim to XKV, no competing usage to unseat, and no confusion with an established brand.
For an organisation whose initials match, this is simply the correct address. For anyone else, it’s a short, distinctive mark with the institutional tone the .org carries. Foundations, research groups, and member associations tend to land on three-letter domains eventually, and the ordinary combinations were taken decades ago.
The X and K give it a hard, technical sound that suits engineering bodies, standards work, and technical publishing more than it suits a consumer brand. That’s a narrowing, but the buyers in that space are exactly the ones who care about a short permanent address.
Three characters, no hyphen, no digit, nothing to spell out twice.
The name is listed. Offers welcome.