‹ Back
Deploy360 23 April 2014

ARIN Reaches Its Final IPv4 /8

Megan Kruse
By Megan KruseDirector, Partner Engagement and Communications

ARIN /8Today, the American Registry for Internet Numbers (ARIN) – the Regional Internet Registry for most of North America and parts of the Caribbean – announced it “is down to its final /8 of available space in its inventory and has moved into Phase Four of its IPv4 Countdown Plan.”

That means, in essence, there’s a little more scrutiny when you go looking for additional IPv4 address space, and that “ARIN may experience situations where it can no longer fulfill qualifying IPv4 requests due to a lack of inventory of the desired block size.”

This doesn’t mean that ARIN is out of IPv4 addresses… but it’s getting really close! There will be no more new IPv4 addresses available in the US, Canada and many Caribbean and North Atlantic islands once this last /8 is gone.

To put that into perspective, one /8 of IPv4 address space is equivalent to about 65,000 /24s and ARIN has delegated an average of 92,000 /24s per year for the past three years. When you factor in that some of ARIN’s last IPv4 space is reserved, a /16 for critical infrastructure and a /10 to aid IPv6 deployment, the math indicates that ARIN could hand out its last free IPv4 addresses within the next 8 months … if not sooner.

So, if you haven’t started planning for IPv6, NOW IS THE TIME!

What are you waiting for?

Check out our IPv6 resources and let us know what help you need – what can we do to make your deployment and operationalization of IPv6 easier?

‹ Back

Disclaimer: Viewpoints expressed in this post are those of the author and may or may not reflect official Internet Society positions.

Related articles

Improving Technical Security 15 March 2019

DNS Privacy Frequently Asked Questions (FAQ)

We previously posted about how the DNS does not inherently employ any mechanisms to provide confidentiality for DNS transactions,...

Improving Technical Security 14 March 2019

Introduction to DNS Privacy

Almost every time we use an Internet application, it starts with a DNS (Domain Name System) transaction to map...

Improving Technical Security 13 March 2019

IPv6 Security for IPv4 Engineers

It is often argued that IPv4 practices should be forgotten when deploying IPv6, as after all IPv6 is a...

Join the conversation with Internet Society members around the world