IP Range Generator - Generate IP Address Lists

Generate lists of IP addresses from CIDR notation, start/end range, or count. Export as plain list, CSV, or JSON for firewall rules and network configs.

Input Mode

CIDR Block

Options

Exclude network address

Exclude broadcast address

Reverse order

Output Format

Generated IPs (0)

Range Summary

First IP:	-
Last IP:	-
Total IPs:	-
CIDR (approx):	-

Common CIDR Blocks

/32 = 1 IP (single host)
/30 = 4 IPs (2 usable)
/28 = 16 IPs (14 usable)
/24 = 256 IPs (254 usable)

/22 = 1,024 IPs
/20 = 4,096 IPs
/16 = 65,536 IPs
/8 = 16.7M IPs

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Frequently Asked Questions

An IP range is a continuous block of IP addresses. Can be specified by start/end IPs (192.168.1.1-192.168.1.254), CIDR notation (192.168.1.0/24), or count (192.168.1.1 + 100 IPs).

CIDR (Classless Inter-Domain Routing) uses IP/prefix format. /24 means 256 addresses (last octet varies), /16 means 65,536 addresses (last two octets vary). Smaller prefix = more addresses.

/24 = 256 addresses (0-255 in last octet). Usable hosts = 254 (excluding network .0 and broadcast .255). Common for small networks and subnets.

Enable 'Exclude network/broadcast' option. This removes the first IP (network address) and last IP (broadcast address) from the list, giving only usable host addresses.

For browser performance, limit to ~65,000 IPs (/16). Very large ranges may slow the browser. For larger ranges, use command-line tools like nmap or Python scripts.

Generate IP list, export as plain text or CSV. Import into firewall (iptables, pf, Windows Firewall) or security groups. Useful for whitelisting/blacklisting IP ranges.

IPv4 uses 32 bits (4 octets), IPv6 uses 128 bits (8 groups of 4 hex digits). This tool focuses on IPv4. IPv6 ranges are typically too large to enumerate.

This tool generates sequential IPs. For random IPs, you'd need a separate random IP generator. Sequential ranges are more common for network configuration.

Plain list (one IP per line), CSV (with index), JSON array, and newline-delimited. Choose based on your import requirements.

Count IPs, find next power of 2, calculate prefix. 256 IPs = /24, 512 IPs = /23. Use our CIDR Calculator for precise calculations from arbitrary ranges.

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