How Does Compressing (Shortening) IPv6 Addresses Work?

IPv6 addresses can be shortened by removing extra zeros and replacing groups of numbers with a single symbol.

Imagine you have a long phone number: 123-0000-4567-8900. That’s hard to remember! But if you shorten it to 123--4567-8900, it becomes easier to say and write. You just removed the extra zeros and used two dashes instead of one group of zeros.

IPv6 addresses are made up of groups of numbers, like four-digit sections. When some groups have a lot of zeros, you can replace them with a single dash (:) to make the address shorter.

For example:

• 2001:0db8:0000:0000:0000:ff00:0042:0001 is a full IPv6 address.
• You can shorten it to 2001:0db8::ff00:0042:0001.

It’s like having a long sentence and replacing repeated words with a shorter phrase, it still means the same thing, but it’s easier to read!