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You are here: Home / ipv4 / ARIN Trials WhoWas Service

ARIN Trials WhoWas Service

November 28, 2011 by Michele Neylon

A little diagram of an IP address (IPv4)
Image via Wikipedia

ARIN is running a trial service that gives users access to historical IP whois data ie. it will tell you who was responsible for an IP address or block of IPs.

The service is not automated and if you want to access it you will need to submit a request via email with information about not only what you want to know, but why you are interested in accessing the information.

The service could be useful for understanding an IP block’s reputation, assuming it has changed hands.

More information about the service on the ARIN site and the announcement here.

Thanks to Scott Pinzon (@spinzon) for bringing it to my attention.

Filed Under: ipv4, ipv6 Tagged With: American Registry for Internet Numbers, ARIN, IP address, Protocols, Regional Internet registry, United States, whois

About Michele Neylon

Michele is founder and managing director of Irish domain registrar and hosting company Blacknight. Michele has been deeply involved in domain and internet policy discussions for more than a decade.
He also co-hosts the Technology.ie podcast.

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