They are global addresses that are unique across the internet.
The devices that need to be publicly identified, such as:
- or mail servers,
must have a globally unique IP address; and they are assigned a public IP address.
How to know your public IP?
To determine the public IP address, if the computer is:
- not behind a proxy, use one of these links:
- behind a proxy, use one of these links to determine its true IP address: