Home / Blogs

How Many IPv4 Addresses Does the RIPE NCC Have Left?

Since IANA ran out of IPv4 addresses, people are increasingly aware of how short the remaining lifetime of IPv4 is. With World IPv6 Day taking place this week, the issue has come into even sharper focus.

Since March 2011, the RIPE NCC has been publishing the size of its pool of available IPv4 addresses. All five Regional Internet Registries (RIRs) regularly publish the status of their IPv4 address pools. In the image below, you can see how the number of IPv4 addresses in the RIPE NCC pool changes over time.

The graph is updated weekly and is adjusted up or down as IPv4 addresses are distributed and returned. Currently, around 4.5 /8s (76 million IPv4 addresses) are still available, with a stable decrease of less than 1 million addresses on average per week over the last three months. A run-out-fairly policy was implemented to ensure a gradual reduction of the allocation and assignment periods. This ensures a fair distribution of the remaining address space.

The graph also includes the 12.58 million IPv4 addresses temporarily set aside for the De-Bogonising New Address Blocks project. Under this project, pilot prefixes are announced to improve the routability of new address blocks. This is done only before real production prefixes are announced from the new block.

The last /8 that the RIPE NCC received from the IANA on 3 February 2011 is included in this graph and is shown by the yellow horizontal line. This last /8 will be allocated according to section 5.6 of the IPv4 Address Allocation and Assignment Policies for the RIPE NCC Service Region. Each Local Internet Registry (LIR) can receive one /22 allocation from the last /8 to ensure that new LIRs can still get IPv4 address space in the future. To receive this allocation, the LIR must have an IPv6 allocation to prepare for the coming transition to IPv6.

The RIPE NCC available pool graph can also be found on the RIPE NCC website.

CircleID Newsletter The Weekly Wrap

More and more professionals are choosing to publish critical posts on CircleID from all corners of the Internet industry. If you find it hard to keep up daily, consider subscribing to our weekly digest. We will provide you a convenient summary report once a week sent directly to your inbox. It's a quick and easy read.

I make a point of reading CircleID. There is no getting around the utility of knowing what thoughtful people are thinking and saying about our industry.

Co-designer of the TCP/IP Protocols & the Architecture of the Internet


 Be the first to post a comment!

Add Your Comments

 To post your comments, please login or create an account.



Threat Intelligence

Sponsored byWhoisXML API


Sponsored byVerisign

Brand Protection

Sponsored byAppdetex

Domain Names

Sponsored byVerisign

Domain Management

Sponsored byMarkMonitor

IPv4 Markets

Sponsored byIPXO