IP Geolocation API - Fast, Accurate & Free | Ipstack

# IPstack > IPstack is a real-time IP geolocation API returning 100+ data fields per lookup: location (country, region, city, latitude/longitude), timezone, local currency, connection details (ISP, ASN, connection type), and security signals that flag VPNs, proxies, and threats. It covers 2M+ locations and 200K+ cities worldwide, supports IPv4 and IPv6, returns JSON or XML within milliseconds, and runs on 99.9%-uptime infrastructure with 256-bit SSL and data sourced through ISP partnerships. Used by companies including Microsoft, Airbnb, Samsung, Activision, and HubSpot. A free API key is available at https://ipstack.com/signup/free — no credit card required. A single lookup is one GET request: api.ipstack.com/{IP_ADDRESS}?access_key=YOUR_KEY. Three endpoints are available: Standard Lookup (single IP), Bulk Lookup (multiple IPs per request), and Requester Lookup (the calling IP). Optional parameters enable hostname resolution, the security module, response-field filtering, output language, and JSONP callbacks. ## Getting Started - [IPstack Homepage](https://ipstack.com/): Real-time IP geolocation API — locate IPs, detect threats, access location, ISP, and timezone data - [How to Use the IPstack API](https://ipstack.com/how-to-use-ipstack-api/): Step-by-step integration walkthrough from signup to first request - [API Documentation](https://ipstack.com/documentation/): Full reference — endpoints, parameters, response objects, errors, and code examples - [Free API Key Signup](https://ipstack.com/signup/free): Create a free account — no credit card required - [Login](https://ipstack.com/login): Access your dashboard, API key, and usage statistics - [Pricing](https://ipstack.com/pricing/): Free, Professional, and Enterprise plan tiers with request volumes and features ## Tools - [Official SDKs](https://ipstack.com/sdk/): Ready-to-use SDKs for quick API integration - [MCP Server](https://ipstack.com/mcp/): Use IPstack from AI assistants via the Model Context P