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About Reclaiming Unutilized The IP Version 4 Address Space

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The Asia Pacific Network Information Centre gathers the viewpoints of its members and other stakeholders with a biannual survey. The survey aids the APNIC Executive Council and Secretariat in better understanding the wishes and requirements of the internet community. The earlier APNIC Survey opened in July last year, and APNIC was expecting to get the feedback of those stakeholders.

The APNIC Survey of 2018 revealed that all organizations were not willing to use IPv6 technology. For that reason, even as it promoted IPv6 deployment, the regional internet registry must keep supporting access to Internet Protocol version 4 or IPv4 addresses. When asked in what way the RIR could do so, its members prioritized the process of reclaiming the unutilized Internet Protocol version 4 address space the most.

In response to that feedback, the Council asked the APNIC Secretariat to treat the work on the reclamation process as important. At the start of the activity, the RIR defined unutilized IPv4 address space thus: “a /24 or more of a delegated prefix that is no longer needed by its registered holder.”For determining the need for a prefix, APNIC contacted its members, who got IPv4 delegations in which the a /24 prefix or a greater number of its delegated prefixes were invisible in the international routing system.

Geoff Huston, the Chief Scientist at APNIC, presented an examination of the routing process and the addressing process on the Web. Huston disclosed that the international pool of allotted yet unadvertised Internet Protocol version 4 address space was about 50 /8s and gradually growing.

In 2019, APNIC staffers analyzed the unadvertised set of the delegations as well as classified those into groups on the basis of the policy applicable to them.

IP Addresses Delegated As Per the Final /8 Policy About Five Years Ago

As per 2020 APNIC policies, it was not possible to transfer the addresses that were delegated under that policy for at least five years following their original delegation. In that period, in the case of the cause of the original IP request not being valid any longer, the resources would have to be given back to APNIC. There were about 370,000 non-advertised IPv4 addresses of around 600 APNIC Members identified in that category. APNIC has urged the members to return the addresses if those are not required.

Addresses Delegated As Per The Same Policy More Than Five Years Ago Or Undelegated Under The Policy

The IP addresses were transferrable under the related policy at APNIC, or it was possible to return those to the RIR’s free address pool. To aid members in IPv4 transfers, there was a new service being formed in MyAPNIC, and the service would let members list the IP prefixes available for transfers. APNIC identified about 50 million non-advertised IP addresses of around 1,400 APNIC members in that category. Besides, it decided to get in touch with the members when the said service would be ready.


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