What is IPv4?

IPv4 (Internet Protocol version 4) is the fourth version of the Internet Protocol responsible for addressing and routing most of today’s Internet traffic. It uses 32-bit addresses (for example, 192.0.2.1), which allows for a total of 2³² = 4,294,967,296 possible addresses.

Such limitations lead to a shortage of available addresses and make them highly sought after in the rental and sale markets.