Three characters on the .com, in the letter-digit-letter pattern that reads and types cleanly. The entire supply of three-character .com names was exhausted long before most current companies existed.
The 4 sits naturally as “for” in the way people actually write shorthand, which gives K4I an implied structure rather than a random string. K for whatever your brand is, I for what it serves. That readability is what separates a usable short domain from a licence plate.
Buyers for names at this length are typically companies that have outgrown a longer domain and want something they can say on a call without spelling it. Or organisations that need one address to work as the website, the email domain, the short link, and the app. Three characters does all four jobs with no compromise.
There’s no traffic story here and no keyword story. The case is scarcity and utility, which are the two things that have held value in this market across every cycle.
Serious enquiries only.