# Floating IPs
Source: https://docs.infraista.com/en/networking/floating-ips



A **floating IP** is a public IPv4 or IPv6 address you reserve for your organization. You point it at a
server, and you can move it to another server in seconds, for example when you replace a server or
fail over. Your DNS records keep pointing at the same address.

<Shot name="networking/floating-ips/list" alt="The Floating IPs page listing two reserved addresses, one attached to web-1 and one not attached" />

## How floating IPs work [#how-floating-ips-work]

* A floating IP is attached to **one server at a time**.
* The server needs a **primary IP of the same type** (IPv4 or IPv6).
* The floating IP and the server must share a **network zone**.
* You don't need to power the server off to attach or detach.
* Servers keep their primary IP too, so they're reachable on both addresses.

## Pricing [#pricing]

A floating IP is billed by the hour **while it's reserved**, whether it's attached or not. The
**Reserve a floating IP** dialog shows the monthly price before you confirm, and each address's page
shows **This month so far**. Traffic through the address is billed on the server, not the IP.
**Release** an address to stop the charge.

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