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CIDR IP List Generator

Expand a CIDR block into a list of all IP addresses

About CIDR Expansion

This tool takes a Classless Inter-Domain Routing (CIDR) block and lists every single IP address contained within it. This is useful for configuring firewalls, creating massive allowlists, or auditing network ranges.

What is CIDR Notation?

CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and routing. A CIDR block like 192.168.1.0/24 represents a range of IP addresses. This tool expands that notation into a complete list of individual IP addresses.

Common Use Cases

Firewall Rules

Generate IP lists for allowlists and blocklists.

Network Inventory

List all IPs in a subnet for documentation and auditing.

Security Scanning

Create target lists for vulnerability assessments.

Script Input

Generate IP lists for automation scripts and tools.

How It Works

1

Enter CIDR Block

Input a CIDR notation like 192.168.1.0/24.

2

Set Options

Choose separator and include/exclude network addresses.

3

Generate List

Click generate to expand the CIDR into IP addresses.

4

Copy or Download

Copy the list or download as a text file.