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Administrative Divisions DB vs PostcodeData.nl

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

APIAdministrative Divisions DBHEALTHY100PostcodeData.nlHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms40692
P95 · ms11141989
Authnonenone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (see repo)Unverified
Free tierFree, no API key required (static JSON via CDN)Free — limits not published
Rate limitNone (static files served over CDN)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Administrative Divisions DB vs PostcodeData.nl: common questions

Which is more reliable, Administrative Divisions DB or PostcodeData.nl?

Both are neck-and-neck — Administrative Divisions DB and PostcodeData.nl each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Administrative Divisions DB or PostcodeData.nl?

Administrative Divisions DB has the lower median latency in our checks — Administrative Divisions DB responds in 40 ms versus PostcodeData.nl at 692 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Administrative Divisions DB and PostcodeData.nl need an API key?

Neither needs a paid key — Administrative Divisions DB is callable with no signup, and PostcodeData.nl is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Administrative Divisions DB and PostcodeData.nl from the browser?

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

Are Administrative Divisions DB and PostcodeData.nl free for commercial use?

Administrative Divisions DB has unclear commercial terms, and PostcodeData.nl 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.