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Callook.info vs Warnely

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

APICallook.infoHEALTHY94WarnelyDYING89
Uptime · 30d
Uptime · 90d100%90.2%
Uptime · 30d100%83.3%
P50 · ms437334
P95 · ms11561375
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 limitUnpublished100 req/window · 99 remaining · resets 60
In directory since2026-07-052026-07-05
operationalpartialdownno data

Callook.info vs Warnely: common questions

Which is more reliable, Callook.info or Warnely?

On our scheduled checks, Callook.info leads on measured uptime — Callook.info at 100% versus Warnely at 90.2% 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 Warnely?

Warnely has the lower median latency in our checks — Callook.info responds in 437 ms versus Warnely at 334 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 Warnely need an API key?

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

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

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

Are Callook.info and Warnely free for commercial use?

Callook.info has unclear commercial terms, and Warnely 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.