CGNAT vs purchase IPv4

This article compares CGNAT and purchasing additional IPv4 addresses. Decide which one is best for your organization's needs and budget.

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CGNAT vs purchase IPv4

IPv4 and IPv6 are two versions of the Internet Protocol (IP), which is used to transmit data across the internet. IPv4 is the original version of the protocol, and it uses 32-bit addresses to identify devices on a network. However, the number of available IPv4 addresses is limited, and they have been exhausted in many parts of the world. As a result, IPv6, which uses 128-bit addresses, was developed to address this shortage.


One solution to the shortage of IPv4 addresses is Carrier-Grade Network Address Translation (CGNAT), which allows multiple devices to share a single public IP address. CGNAT is commonly used by internet service providers (ISPs) to extend the lifespan of their IPv4 address pool, as it allows them to serve more customers without having to purchase additional addresses.

Additional IPv4 addresses

Another solution is to purchase additional IPv4 addresses from a third-party provider. This can be a costly option, as the price of IPv4 addresses has risen significantly in recent years due to the shortage.

The difference between CGNAT and IPv4

In this article, we will compare CGNAT and purchasing IPv4 addresses in terms of their cost, efficiency and security.


CGNAT is not always a more cost-effective option than purchasing additional IPv4 addresses. This is because while ISPs can use CGNAT to serve multiple customers with a single public IP address, which reduces the need for additional addresses, additional CGNAT hardware and logging equipment needs to be purchased and managed.

Purchasing IPv4 addresses can also be a costly option, as the price of these addresses has increased significantly in recent years due to the shortage. The cost of purchasing IPv4 addresses varies depending on the provider and the number of addresses being purchased. However, it is generally equally expensive as using CGNAT.


CGNAT can be a more efficient option than purchasing IPv4 addresses in terms of IPv4 resource usage. This is because CGNAT allows multiple devices to share a single public IP address, which can reduce the load on the existing IPv4 address pool.

However, CGNAT can also introduce some efficiency issues, as it requires additional processing power and equipment to translate the private IP addresses of devices on the network to the shared public IP address. This can result in slower internet speeds for some users.

Purchasing additional IPv4 addresses can improve the efficiency of a network, as it allows each device to have its own unique public IP address. This can result in faster internet speeds and better performance overall.

CGNAT vs purchase IPv4: what to choose?

CGNAT and purchasing IPv4 addresses are both solutions to the shortage of IPv4 addresses. CGNAT is generally a more cost-effective option, but it can introduce some efficiency and security issues. Purchasing IPv4 addresses can improve network efficiency and security, but it can be a costly option.

Ultimately, the decision between CGNAT and purchasing IPv4 addresses will depend on the specific needs and budget of an organization. It is important to carefully consider the pros and cons of each option before making a decision.

Andrew Rogers

IPv4 Broker

“I coordinate with both seller and buyer in order to find the best deal using my in-depth knowledge of the market. The end-to-end support for our partners is what excites me about my role as an IPv4 Broker. Whether it's advising them on their assets and discussing the transaction process or securing a buyer (or seller) and providing all necessary details to initiate the transfer request at the RIR.”

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Andrew Rogers

IPv4 Broker
Why use Prefix Broker?

Buying IPv4 addresses can be complicated and risky. Work with a knowledgeable, experienced broker who can guide you through the process start to finish. Prefix Broker has over a decade of experience in coordinating IPv4 address transactions. We ensure that transfers proceed in a fast and secure manner.

Relax while we handle the details
  • Research the supplying party to confirm they own right-to-use.
  • Check for any other limitations on the use of the IP addresses.
  • Negotiate agreement on price, timing, governing law and currency.
  • Assist in obtaining approval for the transfer by the RIR.

Contact us to discuss an IPv4 purchase today!

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