Hurricane Electric


RWHOIS (RFC2167) is a distributed system for directory information relating to number and name resources on the internet. Hurricane Electric operates this service in the same spirit of general usefulness as it does its looking glass, BGP toolkit, IPv6 Tunnelbroker, and others.

Using the Service

The service operates at on TCP/4321 (the standard port). It accepts the following directives:

Known RWHOIS capable CLI tools:

Web-based RWHOIS capable tools:


In order to prevent abuse there are two main restrictions in place for the service:

Reporting Issues

To report an issue with the RWHOIS service please contact Please include as much information as possible, including, at minimum, your client name and version, the IP address the query is originating from, the query made, and any data returned by the service.