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Callook.info vs iTunes

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

APICallook.infoHEALTHY94iTunesDYING73
Uptime · 30d
Uptime · 90d100%68.6%
Uptime · 30d100%46.7%
P50 · ms437578
P95 · ms11561426
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, Callook.info leads on measured uptime — Callook.info at 100% versus iTunes at 68.6% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Callook.info or iTunes?

Callook.info has the lower median latency in our checks — Callook.info responds in 437 ms versus iTunes at 578 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 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.