WhoWas Service Trial

Posted: Tuesday, 22 November 2011

ARIN is pleased to announce the availability of a trial WhoWas service that will provide historical registration information for a given IP address or ASN.  During the trial, requests should be submitted via email to hostmaster@arin.net and must include details about the registration in question and the reason for the request. 

Requestors will then be required to sign and return an WhoWas Terms of Use Agreement before their WhoWas request can be processed. Because requests will be manually processed during the trial, ARIN reserves the right to set limits on the number of requests that can be made by any single entity, regarding both the number of requests and period of time for requests.

ARIN will make every effort to process requests in a timely fashion, but makes no specific guarantees related to processing time. 

This trial period will run for the remainder of 2011, and will serve to provide much needed data to assist ARIN in defining the scope and requirements for automating this service.  ARIN reserves the right to terminate this service prior to the end of 2011 should request volumes exceed ARIN’s ability to provide responses in a timely manner.  During the trial, ARIN will evaluate, what, if any fees may be charged for future availability of this service.

For full details, instructions on how to take advantage this trial service, and to view the Terms of Use Agreement, please visit:



Nate Davis
Chief Operating Officer
American Registry for Internet Numbers (ARIN)