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ISO 3166-2 API vs Administrative Divisions DB

Same instrument, two spec sheets — measured, not claimed.

APIISO 3166-2 APIUNMONITORED—Administrative Divisions DBNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (see repo)
Free tierFree — limits not publishedFree, no API key required (static JSON via CDN)
Rate limitUnpublishedNone (static files served over CDN)
In directory since2026-07-052026-07-05
operationalpartialdownno data

ISO 3166-2 API vs Administrative Divisions DB: common questions

Which is more reliable, ISO 3166-2 API or Administrative Divisions DB?

Only Administrative Divisions DB is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do ISO 3166-2 API and Administrative Divisions DB need an API key?

Neither needs a paid key — ISO 3166-2 API is callable with no signup, and Administrative Divisions DB is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call ISO 3166-2 API and Administrative Divisions DB from the browser?

Only Administrative Divisions DB is browser-friendly — it returns CORS headers over HTTPS. ISO 3166-2 API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ISO 3166-2 API and Administrative Divisions DB free for commercial use?

ISO 3166-2 API has unclear commercial terms, and Administrative Divisions DB has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.