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Nationalize.io vs NetworkCalc

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

APINationalize.ioHEALTHY93NetworkCalcHEALTHY91
Uptime · 30d
Uptime · 90d97.1%99.02%
Uptime · 30d100%98.3%
P50 · ms448448
P95 · ms9853976
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierKeyless usage limited (x-rate-limit-limit: 25 observed); 2,500 names/mo with a free keyFree public API, no key
Rate limitKeyless cap 25 per x-rate-limit-limit header; remaining/reset exposed in response headersUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Nationalize.io vs NetworkCalc: common questions

Which is more reliable, Nationalize.io or NetworkCalc?

On our scheduled checks, NetworkCalc leads on measured uptime — Nationalize.io at 97.1% versus NetworkCalc at 99.02% 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, Nationalize.io or NetworkCalc?

They're evenly matched on speed — both Nationalize.io and NetworkCalc post a 448 ms median (P50) in our checks. Look at the P95 row above if worst-case latency matters more than the typical response for your use case.

Do Nationalize.io and NetworkCalc need an API key?

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

Can I call Nationalize.io and NetworkCalc from the browser?

Yes — both Nationalize.io and NetworkCalc 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 Nationalize.io and NetworkCalc free for commercial use?

Nationalize.io has unclear commercial terms, and NetworkCalc 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.