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HackMyIP vs Zipcodestack

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

APIHackMyIPNEW—ZipcodestackNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseUnverifiedUnverified
Free tierCompletely free — no API key, no signupFree tier — API key required
Rate limit100 req/windowUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

HackMyIP vs Zipcodestack: common questions

Which is more reliable, HackMyIP or Zipcodestack?

On our scheduled checks, Zipcodestack leads on measured uptime — HackMyIP at —% versus Zipcodestack 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 HackMyIP and Zipcodestack need an API key?

HackMyIP needs no key, while Zipcodestack requires a free API key. If you want to start calling without signup, reach for HackMyIP first.

Can I call HackMyIP and Zipcodestack from the browser?

Yes — both HackMyIP and Zipcodestack 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 HackMyIP and Zipcodestack free for commercial use?

HackMyIP allows commercial use on its free tier, and Zipcodestack 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.