The Prefix WhoIs Project is a whois-compatible project designed for routing and network engineering use cases. It provides a public query service, command-line clients, a server framework, and development libraries. Its key distinction is that it does not primarily rely on registrar-sourced network information; instead, it uses Internet global routing tables collected from multiple routing peers around the world. This makes it better suited for querying practical routing-layer data such as IP prefixes and origin AS information.
The toolchain is fairly complete: WhoB is a command-line whois client tailored for network engineers and is also used by Layer Four Traceroute; pWhoIsd can run as a server to answer whois queries; and pWhoIs-updatedb can parse router RIB or route-views data and write it into a relational database. Query output supports formats such as pWhoIs-native, Cymru, and RPSL, and the service can also be accessed with a standard whois client via whois.pwhois.org. On the development side, C and PHP libraries are available, though the PHP-related libraries are marked as work in progress and depend on PHP 5.x sockets, so the technology stack is clearly on the traditional side.
No commercial pricing is disclosed in the main content. The servers and network resources for the public service are donated by public or private organizations. The example Web Proxy is explicitly not allowed for production use or automated queries; if you need more than a few thousand queries per day, you must submit an online form to request a higher quota. This means it is suitable for testing, troubleshooting, and research, but production use should first confirm rate limits, authorization, and support conditions.
The strengths are strong protocol compatibility, access via standard whois clients, and support for self-hosted components, making it easy to integrate into existing network toolchains. Its data model, based on global routing tables, is also closer to routing reality than purely registration-based information. The downsides are that the website information appears dated, and there is no obvious modern REST API, authentication, SLA, cloud deployment option, or clear licensing statement. Public information on support, payment methods, and commercial guarantees is also lacking.
It is best suited for ISPs, network engineers, security researchers, and developers of BGP/routing analysis tools, especially for IP-to-ASN lookup, prefix ownership checks, and path troubleshooting support. Access from mainland China is not covered in the main content, so it should be considered unknown. If public whois connectivity is unstable, alternatives such as Team Cymru, RIPEstat, BGPView, RADb, or Hurricane Electric BGP Toolkit may be worth considering.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on pwhois.net official site.
pwhois.net is an Unknown Dev Tools provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach pwhois.net directly.