IPstack provides a real-time IP geolocation API designed to help developers and businesses turn IP addresses into useful location and network information. Through a simple REST API, customers can retrieve details such as country, region, city, latitude and longitude, local currency, timezone, internet service provider, connection type and autonomous system number. The service supports IPv4 and IPv6 and draws on data covering more than two million locations and 200,000 cities.

Beyond location lookups, IPstack offers security features that identify VPNs, proxies and suspicious access patterns, helping organizations assess potentially risky traffic. Common applications include delivering location-based content and advertising, personalizing language and currency, supporting fraud prevention, and automating tax, compliance and shipping workflows. The service is presented as scalable and secure, with 256-bit SSL encryption and a stated 99.9% uptime.

Developers can start for free and access documentation, SDKs, a Postman collection, API status information and technical support. IPstack is part of a broader API suite that also includes services for currency, market data, phone validation and device detection.