ip-resolver

A free, no-signup IP geolocation API. Look up country, city, coordinates, and network (ASN) for any IPv4 or IPv6 address.

Usage

curl https://ipresolver.crabdance.com/json          # your own IP
curl https://ipresolver.crabdance.com/ip/8.8.8.8    # any IP

Example response:

{
  "ip": "8.8.8.8",
  "continent": "North America",
  "continent_code": "NA",
  "country": "United States",
  "country_code": "US",
  "region": "California",
  "city": "Mountain View",
  "latitude": 37.4223,
  "longitude": -122.085,
  "asn": 15169,
  "org": "Google LLC"
}

Private/reserved addresses return {"bogon": true}. Invalid input returns HTTP 400. CORS is open (Access-Control-Allow-Origin: *), so you can call it straight from the browser.

Fair use

Free for any use up to 60 requests/minute per client. No key, no signup. Cache results on your side where you can — IP geolocation data changes slowly.