Reference assistant · bring your own key
Ask the Desk
AI answers, grounded in this directory · powered by Claude
Ask anything about the codes filed here — “Which country uses +358?”, “What's the difference between 301 and 308?”, “Which airport is HND?” — and get an answer grounded in the directory's own 2,372-entry ledger, with links back to the source pages.
Your key stays yours. This site has no server and no accounts. Your Anthropic API key is
stored only in this browser (localStorage) and every request goes directly from your
browser to api.anthropic.com — we never see, receive, store or pay for it. Usage is billed to
your own Anthropic account at their rates. Get a key at
platform.claude.com, and use the
Forget-key button any time.
AI answers can be wrong — verify against the ledgers and the official standards. See the Disclaimer and Privacy Policy.