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Callook.info vs Statistics of the World

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

APICallook.infoNEW—Statistics of the WorldNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (data from public FCC ULS records)Unverified (data sourced from World Bank & IMF)
Free tierFree — limits not publishedFree — no key (optional X-API-Key header)
Rate limitUnpublished1000 req/window · 999 remaining · resets 2026-07-09T11:30:37.514Z
In directory since2026-07-052026-07-05
operationalpartialdownno data

Callook.info vs Statistics of the World: common questions

Which is more reliable, Callook.info or Statistics of the World?

On our scheduled checks, Statistics of the World leads on measured uptime — Callook.info at —% versus Statistics of the World at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Callook.info and Statistics of the World need an API key?

Neither needs a paid key — Callook.info is callable with no signup, and Statistics of the World is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Callook.info and Statistics of the World from the browser?

Yes — both Callook.info and Statistics of the World send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Callook.info and Statistics of the World free for commercial use?

Callook.info has unclear commercial terms, and Statistics of the World 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.