Location and network for any IP

One GET returns where an IP is and which network runs it: country, region, city, coordinates, timezone, ASN, ASN organisation and ISP. No key, no signup, CORS enabled so you can call it straight from a browser or an extension.

This is the same lookup that powers the free proxy list and our own proxy checker, so if you are writing a proxy checker of your own, you can label your results with exactly the data we label ours with. It is read from offline databases, so there is no third-party API in the path.

Two limits apply per IP, and they are deliberately separate. Requests on this single-address door are capped at 900 in a burst, refilling 30 per second. Addresses are capped by the budget described under the batch endpoint below, and both doors draw on that same budget, so a hundred thousand single lookups cost exactly what one batch of a hundred thousand costs. Every answer reports the address budget in X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Cost, so you can pace yourself from the headers rather than discovering the limit by being refused. Past either one you get a clean 429 with Retry-After.

Responses carry Cache-Control: public, max-age=21600: an address's location and ASN move on the order of weeks, so cache them hard rather than re-asking on every run.