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Callook.info

United States ham radio callsigns

Open documentation ↗
No keyHTTPSNo CORSOpen Data

Verified 4 days ago: 100% uptime

API key

Not required

HTTPS

Supported

Browser calls

No, needs a proxy

Status

Live · 100/100

What our checks found

Health score
100/100
Reliability
100%
Average latency
1403ms

Last checked 2026-09-18. Measured independently, not self-reported by the provider.

How to call it

A starting template for Callook.info. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.

# No authentication required.
curl -s "https://callook.info/ENDPOINT" \
  -H "Accept: application/json"

This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.

Where this listing comes from

Aggregated from 2 public sources (public-api-lists, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.

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Callook.info — common questions

Answered from what our own scheduled checks found, not from the provider's marketing.

Is Callook.info free to use?

Callook.info is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.

Does Callook.info need an API key?

No. We called Callook.info on 2026-09-18 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.

Can I call Callook.info from browser JavaScript?

Not directly. Callook.info did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.

Is Callook.info still working?

Yes, as of 2026-09-18. Our automated check reached Callook.info and recorded a 100% reliability score with a median response time of 1403 ms. We re-check on a schedule, and this page updates with the result.

Is Callook.info available over HTTPS?

Yes. Callook.info serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.