DirectoryCodes · About
About DirectoryCodes
Last updated 2026-07-18
DirectoryCodes takes its domain name literally: it is the directory of the world’s codes — the standardized identifiers that quietly run everything, gathered on one desk and made pleasant to look up.
The web is full of these codes: the HTTP status codes servers answer with, the ISO country codes in addresses and domains, the currency codes on price tags, the language codes in every locale, the airport codes on boarding passes, the port numbers in every connection string, the time-zone abbreviations in every meeting invite, the barcode prefixes on every product, the customs chapters behind every shipment, the oval stickers on every travelling car, and the phonetic alphabet that spells them all out loud.
Sources
Data is compiled from the authoritative registries and respected open datasets: the IANA HTTP Status Code and Port Number registries, ISO 3166 and ISO 4217 (via the open datasets/mledoze projects), ISO 639-1, OurAirports open data, the GS1 prefix list, and the WCO Harmonized System at chapter level. Collections are frozen at build time and refreshed with each site update; every ledger is also available for download as JSON and CSV.
Principles
- Fast and quiet. Static pages, no accounts, no cookies, no trackers, no external requests.
- Accurate first. Official registries over folklore; every collection names its source.
- Made to be used. Instant search, a page for every code, one-click copy, open data.
- AI on your terms. The Ask the Desk assistant is strictly bring-your-own-key: your key stays in your browser, and requests go directly to the AI provider.
DirectoryCodes is published by Thorsten Meyer and powered by Thorsten Meyer AI.