Addressing and transition

Addresses, in many different forms, are used every day to locate somebody or something spatially or geographically, to identify a fixed or mobile device or to send messages to electronic mailboxes.

Most of these addresses either have a textual representation, or they may consist of numbers much easier to forget – therefore the phonebook was invented. In case of electronic communication, users don’t have to care much about the representation of addresses being used by technical systems. Instead one can access services via web site names such as

When it comes to devices connected to the Internet, Internet Protocol (IP) addresses are used by devices use to communicate with each other - version 4 (IPv4) and the newer version 6 (IPv6) make up the basic system for addressing systems on the Internet. 

The GEN6 project released an new booklet which will give you a short introduction to IP addressing and the structure of IPv6 addresses, on how you can get IPv6 address space and the options you have to structure and tailor the address space to your needs.

Furthermore, this document gives an overview of useful options for going from an IPv4-only network to an IPv4+IPv6 dual-stack network. Download the booklet now for free at