By: Jack Hazan, EVP IPv4.Global

In a publication released on October 2, 2020, RIPE NCC reported its first seizure of IPv4 registration rights pursuant to a Dutch court order. Pursuant to the order, RIPE NCC effectuated a transfer of the IP Addresses from the liquidating debtor to its creditor. Although these IP Addresses could not be owned — they were apparently not legacy, and thus conferred no “property rights” — the registration rights were deemed an enforceable right that has value, and were to be utilized towards satisfaction of a judgment.

RIPE NCC provided specific guidance for future cases:

In…


The “IP” in IPv4 and IPv6 stands for Internet Protocol, which is a set of rules that determine how devices transmit data packets across the Internet. Internet Protocol also assigns a unique address to each device on the web. These addresses ensure data packets are routed to the correct device.

What is IPv4?

IPv4 or Internet Protocol Version 4 is the most common protocol for transmitting data packets on the web. IPv4 provides both the identification (IP addresses) for each device on the Internet and the rules that govern how data packets are transmitted between those devices.

With IPv4, a typical IP address…


Everyone hates spam. Even worse is malware — something that infects your computer and sends spam out to you and others or tries to hack into systems. In response to these problems, many people began to maintain lists recording who generates spam and malware. An “IP blacklist” is used by most mail servers and some firewalls as a step in deciding whether to accept emails, mark as “Junk,” or just drop traffic altogether.

IP Blacklist Listings

Different blacklists have different ways of collecting addresses. Some mail servers collect data from users clicking “This is spam” and report this to blacklist maintainers, while other…


By Jan Zorz | May 14, 2020

Resource Public Key Infrastructure (RPKI) is a mouthful. Essentially, RPKI ensures that the network saying, “We are the place to send traffic for network A.B.C.D” really is the right place. It is a way of improving the security of the Border Gateway Protocol (BGP), which uses the Autonomous System Number (ASN) to identify a network, which is a block of IP addresses. It doesn’t matter whether they are IPv6 or IPv4 addresses.

RPKI will validate the origin of the IP prefix (the IP address block in CIDR notation) (“Send traffic for A.B.C.D to…


With address prices rising, the reasons you may want to become a lessor are clear: extended predictable revenue. Leasing creates an opportunity to monetize IP addresses and sell an IP block for a higher price in the future versus in the current market — it allows the lessor to keep the IPv4 block in case of future need.

But what are the benefits to the lessee (the one receiving the IP address block)? Not as obvious, but still substantial for many businesses, there are a number of advantages, including:

1. It is sometimes preferable to use OpEx instead of CapEx.

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