What a match means
Only that the length and the allowed characters look like the published format for that prefix. Spaces, dots and hyphens are ignored. The European Commission’s VIES service is the official EU VAT lookup; this page is not a substitute for it. A Kenya PIN is checked against the published eleven-character shape (a letter, nine digits, a letter), not against KRA’s register.
For a due-diligence file on one company, built from public registries and public sanctions lists, KYB Report Basic is $49 (KSh 6,300), or Enhanced $99 (KSh 12,800). Payment is by card via Gumroad, on the pricing page. It is not a regulated KYC or AML service, and it is not legal advice.