CDNCheck

CDNCheck is a utility that detects various technologies running on a given IP address. Developers use it to identify which services and applications are exposed at specific IP locations, useful for reconnaissance and infrastructure assessment. The tool can detect CDN providers, check CNAME records, and identify running technologies through API queries. It is developed by ProjectDiscovery and written in Go.

CDNCheck is distributed under the MIT license, making it free and open source. The tool functions as both a command-line utility and a library that can be integrated into other applications. It operates by querying IP addresses to map out the technology stack and services associated with them, supporting workflows for security professionals and infrastructure teams conducting network reconnaissance and exposure analysis.