Edward A. Feustel wrote:
etc. Were not the K prefixes assigned to territories KX
prefixes where X indicated the place? KL7 for Alaska and KH6 for Hawaii (if
I recall properly).

More or less, no.

Before WW2, Puerto Rico was K4; Alaska K7; and Hawaii K6. There were
some two-letter prefixes in the Pacific, and the Phillippines (which
were then a U.S. possession) got KA1 calls.
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com