Free IP Geolocation API — IP Lookup in JSON

Query any IPv4 or IPv6 address and receive its geolocation, ISP, ASN and hostname in JSON format. Free, no API key, no signup, CORS enabled.

Endpoint: https://monip.lws.fr/api/{ip}
Method: GET
Parameter: {ip} — Valid IPv4 or IPv6 address
CORS: Enabled (Access-Control-Allow-Origin: *)
Cache: 1 hour (Cache-Control: public, max-age=3600)
Rate limit: No strict limit — fair use required

Request example

With cURL

curl https://monip.lws.fr/api/8.8.8.8

With JavaScript (fetch)

fetch('https://monip.lws.fr/api/8.8.8.8')
  .then(r => r.json())
  .then(data => console.log(data));

Response

{
  "ip":           "8.8.8.8",
  "version":      4,
  "is_private":   false,
  "hostname":     "dns.google",
  "country":      "United States",
  "country_code": "US",
  "flag":         "🇺🇸",
  "region":       "California",
  "city":         "Mountain View",
  "timezone":     "America/Los_Angeles",
  "latitude":     37.386,
  "longitude":    -122.0838,
  "asn":          "AS15169",
  "asn_org":      "Google",
  "isp":          "Google",
  "db_available": true
}

Response fields

Champ	Type	Description
`ip`	string	Queried IP address
`version`	int	Protocol version (4 or 6)
`is_private`	bool	true if the address is private / reserved
`hostname`	string\|null	Reverse DNS (PTR) — null if absent
`country`	string\|null	Country name
`country_code`	string\|null	ISO 3166-1 alpha-2 country code
`flag`	string\|null	Country flag emoji
`region`	string\|null	Region / subdivision
`city`	string\|null	City
`timezone`	string\|null	IANA time zone
`latitude`	float\|null	Latitude (~50 km accuracy)
`longitude`	float\|null	Longitude (~50 km accuracy)
`asn`	string\|null	Autonomous system number (e.g. AS15169)
`asn_org`	string\|null	Network owner organisation
`isp`	string\|null	Internet service provider
`db_available`	bool	true if local MMDB database is available

Errors

// HTTP 400
{
  "error": "Invalid IP address"
}

Try it

8.8.8.8 (Google DNS) 1.1.1.1 (Cloudflare) 2001:4860:4860::8888 (IPv6)

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