thehardwarestore.ai

cdncheck is a Go library and CLI tool for identifying whether an IP address or domain belongs to a CDN, WAF, or cloud provider. It uses embedded CIDR range data (compiled from ASN, URL, and static CIDR sources) and efficient IP matching via the `bart` radix tree. The library provides a clean `Client` interface with methods like `CheckCDN`, `CheckCloud`, `CheckWAF`, and `CheckDomainWithFallback` that also resolve DNS and check CNAME suffixes. The CLI wraps this with input/output handling, filtering, and JSON output. The codebase is well-structured, with clear separation between core logic, data generation, and CLI runner. It is actively maintained by ProjectDiscovery and used in their security scanning ecosystem.