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The Hidden Value of IPv4 Addresses and How to Take Advantage of Rising IPv4 Address Value

Everything You Need to Know About IPv4 vs. IPv6

IPv4 Markets / Recently Commented

Spamhaus Policy Block List Update

Recently, I wrote about the Spamhaus Policy Block List (PBL), suggesting senders encourage their network/connectivity service providers (whomever they lease or purchase IP addresses from) to list their illegitimate email-sending IPs as a step towards improving the overall email stream on the internet. The initial PBL was seeded with listings from the Dynablock NJABL ("Not Just Another Bogus List"), which at the time of the cut-over was at more than 1.9 million entries... more

AWS Sets the ROI Benchmark for IP Addresses

In a rapidly evolving digital landscape, the value of IP addresses has surged to the forefront of discussions. Over a month ago, Amazon Web Services (AWS) made a pivotal announcement, reshaping the IP address pricing landscape. Citing the escalating costs of acquiring IP addresses on secondary markets, AWS declared a fundamental shift in its pricing strategy, set to take effect on February 1, 2024. more

IPv4 Prices: Supply and Demand in 2023

In early 2022 the discount that had been available for large blocks of IPv4 addresses disappeared. For the first time in years, /16 blocks and larger began to sell at an increasing premium. By Q2-2023, small and medium-sized blocks sold for a 30-35% discount to larger ones. At the same time, the tighter range of prices that had persisted for nearly a decade fractured and blocks traded in wide ranges throughout 2022 and the first half of 2023. more

Amazon Web Services to Charge for IPv4 Addresses Amidst Rising Costs and Scarcity; Urges Shift to IPv6

Amazon Web Services (AWS) will charge customers for public IPv4 addresses effective February 1, 2024. The charge will be $0.005 per IP per hour for all public IPv4 addresses, irrespective of whether they're attached to a service. more

The 2022 IPv4 Market in North America

In 2021, the story was price. In 2022, the story was price and large block supply. Spurred by unprecedented unit pricing, the IPv4 market in North America experienced its second-best year ever in market history. Nearly double the number of IPv4 addresses were traded in 2022 compared to 2021, predominantly due to the increased flow of large block supply from twelve sellers, five of whom were first-time market participants. more

The IPv4 Price Inversion

A curious price inversion has occurred in IPv4 markets. The long-term trend that discounted large blocks has reversed. The graph identifies /15 and /16 (large) block pricing per IP address throughout the period in the form of dark spots. It is evident that, for most of the timeframe here (2014 to the first half of 2021), large blocks sold at a significant discount. One might guess that the administrative chores related to large-network needs were most efficiently and cheaply satisfied with large blocks. more

Some Random Notes from IETF 115

The IETF held its 115th meeting in London in November 2022. This was another in the set of hybrid meetings with specific support for online attendees in addition to the normal face-to-face meetings for the week. In no particular order, here are a few of my impressions from the IETF meeting. more

Hijacked IP Addresses

From time to time, a party can get out of control. Raucous celebration can become careless, even destructive. Combine a critical number of young people, a certain amount of beer and lots of music and damage often happens. Partygoers leave a mess behind them. The same thing happens to some IP addresses. Malicious actors use IP addresses properly registered to someone else. more

IP Address Location Data

The last few years have shown us how the Internet shrinks distances between distributed teams, organizations and families. This poses a challenge for some organizations. Many business relationships and contractual agreements involving the Internet have geographical implications and restrictions. This matters to anyone operating a network. It is most important for networks that get new address space. more

The Hidden Value of IPv4 Addresses

All devices that connect to the internet need unique addresses. The number of IP addresses is limited, creating a demand for addresses worldwide, particularly from the cloud computing industry. This demand has raised the value of IPv4 to levels that the internet's original developers didn't predict, in part because the internet was considered an experiment at the time. Of course, use - and so demand -- has exceeded anyone's realistic expectations. more

IP Address Blocking

A network can fence its own IP addresses or block specific external ones from access. Administrators frequently block access to their own IP addresses to bar unwanted access to content. Individual IPs or blocks of IPs may also be blocked due to unwanted or malicious behavior. IP address blocking prevents a specific IP address or group of IP addresses from connecting with a server, computer, or application. more

CIDR in Networking: Improved IP Routing Efficiency

CIDR (Classless Inter-Domain Routing) is a routing system in which network engineers can distribute IP addresses based on the size of their specific network. This is more efficient than the previous system, which assigned IP addresses depending on whether the size of a network fits into one of only three sizes: Class A, Class B, and Class C. more

Sanctions & The Regulation of IP Transfers

The early stages of internet development operated in a culture of independence from outside influence. In fact, as though to commemorate the spirit of the times, in 1996, John Perry Barlow wrote "A Declaration of the Independence of Cyberspace." In it, he told governments they "have no sovereignty where we gather." He went on to state, "Ours is a world that is both everywhere and nowhere, but it is not where bodies live." more

The IPv4 Market in 2021

Price was the story of the 2021 IPv4 market. Large and small organizations alike continue to invest in their IPv4 infrastructure causing demand for IPv4 address space to intensify. Meanwhile, supply remains constrained. These market factors drove prices up at a historic rate in 2021. more

The Changing Role of IP Addresses in the Architectural Evolution of the Internet

I work at APNIC, the Regional Internet Registry that serves the Asia Pacific Region. APNIC provides common infrastructure services for the region that support the unique assignment of IP address blocks to Internet network operators within our region through the operation of an address registry. In short, IP addresses are what we do. So, when there are discussions in technology circles about evolving the Internet's address model in varying ways,... more