---
title: Private Networks reserved IP ranges
description: This page provides information on IP ranges reserved by Scaleway that cannot be used with Private Networks.
tags: pn reserved ip range rfc
dates:
  validation: 2026-04-09
  posted: 2026-04-09
---

When creating a [Private Network](/vpc/how-to/create-private-network/) with a custom subnet prefix, you can choose any non-internet routable prefix, except from these ranges, which are reserved by Scaleway:

- `127.0.0.0/8`
- `0.0.0.0/8`
- `100.64.0.0/10`
- `169.254.0.0/16`
- `224.0.0.0/4`
- `255.255.255.255/32`

Instead, you can use subnet ranges described in RFC 1918.

## RFC 1918 address ranges

[RFC 1918](https://datatracker.ietf.org/doc/html/rfc1918) defines the IP address blocks reserved for private networks. These addresses are not routable on the public internet, which allows organizations to build internal networks without consuming public IPv4 addresses.

The three authorized and recommended blocks are the following:

| Original Class | IP Address Range            | CIDR Prefix        | Total Addresses   |
|----------------|-----------------------------|--------------------|-------------------|
| Class A        | 10.0.0.0 – 10.255.255.255   | 10.0.0.0/8         | 16,777,216        |
| Class B        | 172.16.0.0 – 172.31.255.255 | 172.16.0.0/12      | 1,048,576         |
| Class C        | 192.168.0.0 – 192.168.255.255 | 192.168.0.0/16   | 65,536            |