REST API for IPv4 and IPv6

IP lookup API for location, network and security data

Send an IPv4 or IPv6 address and get its country, city, coordinates, time zone, currency, ISP and ASN as JSON, plus VPN, proxy and Tor flags.

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150 free requests a month, no credit card required.

The live API console needs JavaScript. The documentation has every request and answer: read the documentation.

One request, one JSON object

Call /v1/info with an IP address and your API key. Leave out the IP to look up the caller's own address.

Request

curl "https://api.iplookupapi.com/v1/info?ip=80.110.0.1" \
  -H "apikey: YOUR_API_KEY"

Get a free keySign up and copy your API key from the dashboard. No credit card needed.
Call /v1/infoSend the key in the apikey header. Leave out ip to look up the caller.
Use the JSONPick fields with fields=, or send up to 1,000 IPs to /v1/batch.

Response (shortened)

{
  "data": {
    "ip": "80.110.0.1",
    "type": "v4",
    "connection": {
      "asn": 8412,
      "organization": "Magenta Telekom GmbH",
      "isp": "Magenta Telekom",
      "range": "80.110.0.0/24"
    },
    "location": {
      "latitude": 48.198674,
      "longitude": 16.348388,
      "zip": "1010",
      "country": {
        "alpha2": "AT",
        "name": "Austria",
        "is_in_european_union": true,
        "currencies": [{ "code": "EUR", "symbol": "€" }]
      },
      "region": { "name": "Vienna" },
      "city": { "name": "Vienna" }
    },
    "timezone": {
      "id": "Europe/Vienna",
      "current_time": "2026-10-14T16:46:37+02:00",
      "code": "CEST",
      "is_daylight_saving": true,
      "gmt_offset": 7200
    },
    "security": {
      "is_vpn": false,
      "is_proxy": false,
      "is_tor": false,
      "threat_score": 0
    }
  }
}

What you get for every IP

Four groups of fields, the same for IPv4 and IPv6. The fields parameter returns only the ones you need.

Location

Country with ISO codes, region, city, postal code, coordinates and continent.

location.country.alpha2
location.region.name
location.city.name
location.zip
location.latitude

Network

Who runs the address: ISP, organization, ASN and the range it belongs to.

connection.isp
connection.organization
connection.asn
connection.range

Hosting, CDN and mobile carrier data from the Basic plan.

Time and money

The local time zone with DST and offset, plus the country's currencies and calling codes.

timezone.id
timezone.current_time
timezone.gmt_offset
location.country.currencies

Security

Flags for VPNs, proxies, Tor exit nodes and data centers, and a threat score.

security.is_vpn
security.is_proxy
security.is_tor
security.is_datacenter
security.threat_score

From the Professional plan.

What teams build with it

Common jobs and where to start.

Show prices in the visitor's currencyPick the currency and number format from the visitor's country. Localize by countryISO codes, EU membership and language defaults in one call. Send at local timesSchedule emails and notifications in each recipient's time zone. Enrich logs and listsLook up to 1,000 addresses in one POST request. Flag VPN, proxy and Tor trafficSecurity data for sign-up checks and fraud review. Give your AI agent IP lookupsA hosted MCP server for Claude, Cursor and other agents.

Guides

Step-by-step help with finding and understanding IP addresses.

Find your IP address on any devicePublic and local IP on Windows, Mac, iPhone, Android and more. Where am I? See where your IP places youWhat IP location shows, how accurate it is and why it can be wrong. How IP geolocation worksRegistries, geofeeds and measurements: where IP location data comes from. Find your router's IP addressThe default gateway on every device, plus common router defaults. Local vs. public IP addressThe private ranges, NAT, and how to find your local IP. Static vs. dynamic IP addressWhen a fixed IP is worth it and how to set one up. Find a printer's IP addressOn the printer, in Windows and macOS, and in your router. Get the real client IPBehind proxies, load balancers and CDNs, without trusting fake headers.

We could integrate iplookupapi.com within a few minutes, and it has worked reliably ever since. The support team is great and very resourceful, and the API is easy-to-use and has helped us increase our international business.