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Callook.info vs iTunes

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

APICallook.infoNEW—iTunesNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (data from public FCC ULS records)Unverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Callook.info vs iTunes: common questions

Which is more reliable, Callook.info or iTunes?

On our scheduled checks, iTunes leads on measured uptime — Callook.info at —% versus iTunes 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 iTunes need an API key?

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

Can I call Callook.info and iTunes from the browser?

Only Callook.info is browser-friendly — it returns CORS headers over HTTPS. iTunes needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Callook.info and iTunes free for commercial use?

Callook.info has unclear commercial terms, and iTunes 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.