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IPv4 Address Space

Posted: Mon, 27 Oct 2003

There have been press articles posted over the past year that make statements about the remaining pool of IPv4 address space. A recent article states there is a shortage and that Internet Protocol Numbers will run out some time in the year 2005.

The Regional Internet Registries (RIRs) do not themselves make predictions about when the remaining IPv4 address space will be depleted. They do, however, report on the rates of RIR allocation of IPv4 address space and on the state of the remaining pool of unicast IPv4 address space.

The RIRs report statistics regarding IPv4 allocation on their respective web sites and present a Joint Statistics report at each of the RIR meetings and at other Internet industry meetings several times yearly. The most recent presentation on this subject can be found at the following location.

http://www.arin.net/statistics/index.html

This report states that the RIRs have collectively allocated 19.59 /8 equivalents between the dates of January 1999 and June 2003 (4.5 years). It also identifies that there are 91 /8 equivalents held by the IANA in reserve for future allocation by the RIRs.

The RIRs will continue to report this information on a regular basis and will work closely with the IANA to ensure the efficient management of the remaining IPv4 address space.

Richard Jimmerson
Director of Operations
American Registry for Internet Numbers (ARIN)

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