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Remaining IPv4 Address Space Drops Below 5%

Submitted by on 10 September, 2021 – 4:32 am

Amsterdam – The Number Resource Organization (NRO) announced today that less than five percent of the world IPv4 addresses remain unassigned. APNIC, the Regional Internet Registry for the Asia-Pacific region has been allocated two blocks of IPv4 addresses by the Internet Assigned Numbers Authority (IANA). This last assignment means that the IPv4 free pool fell below 10% in January, just nine months ago. Since then, more than 200 million IPv4 addresses are assigned by IANA to Regional Internet Registries (RIRs).

“This is an important milestone in the life of the Internet, and the media that the recent allocation of IPv4 blocks to the RIRs is imminent,” said Axel Pawlik, Chairman of the Number Resource Organization (NRO), the official representative the five RIRs. “It is essential that all stakeholders in the Internet now take definitive action to ensure the timely adoption of IPv6.”

IPv6 is the “new generation” Internet Protocol, providing an address space was greatly expanded, allowing the Internet to grow in the future. In 2010, the five RIR is expected to allocate more than 2,000 blocks of IPv6 addresses, which represents an increase of over 70% in the number of IPv6 allocations in 2009. In contrast, the number of IPv4 allocations is expected to grow only by 8% in 2010. These statistics indicate an absence of last-minute “spike” in IPv4 addresses, and a strong momentum after the adoption of IPv6.

“The allocation of Internet number resources for the five RIR allows all regions of the world for the benefit of fair and equitable resolution of IPv4 and IPv6. We are also actively collaborating with stakeholders at local, regional and global to provide training and advice to public sector organizations and private sectors in the adoption of IPv6 to ensure that everyone is prepared for the exhaustion of IPv4 and IPv6 deployment, “said Pawlik.

The IANA allocates IPv4 addresses to the RIRs in blocks equivalent to 1/256th of IPv4 address space (each block is called “/ 8” or “bar-8”). The most recent assignment means that there are now only 12 of these blocks available, which is less than five percent of the entire IPv4 address pool.

The last five blocks of IPv4 addresses is distributed simultaneously to the five RIRs, leaving only seven blocks to be delivered under the normal distribution method.

According to the current depletion rates, the last five blocks of IPv4 addresses allocated to the RIR in early 2011. The pressure to adopt IPv6 is increasing. Many worry that without adequate preparation and action, there will be a chaotic struggle for IPv6, which could increase costs and threaten Internet stability and security of the global network.

About the Number Resource Organization (NRO)
The Number Resource Organization (NRO) is the coordinating mechanism of the five Regional Internet Registries (RIRs). The RIR – AfriNIC, APNIC, ARIN, LACNIC and RIPE NCC – to ensure fair and equitable distribution of Internet number resources (IPv4 and IPv6 addresses and Autonomous System numbers (AS)) in their respective regions. The NRO exists to protect the fund number assigned to Internet resources, policies encouraging the development of open and based on consensus, and provide a single point of contact for communication with the RIR. Learn more about the NRO in / media.

About Regional Internet Registries (RIRs)
The five Regional Internet Registries (RIRs) that comprise the NRO are independent, nonprofit organization members who support the infrastructure of the Internet through technical coordination. The Internet Assigned Numbers Authority (IANA) allocates blocks of IP addresses and ASN, known collectively as Internet number resources to the RIRs, who then distribute them to users within their own specific areas of service. Organizations that receive funds directly from the RIR include Internet service providers (ISPs), telecommunications organizations, corporations, governments, academia, and industry stakeholders, including end users.

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