Network

IPv4 range expander

Expand a CIDR, start–end range, or trailing wildcard with a bounded output size.

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Result

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Using this tool

List addresses in a range or calculate one covering CIDR.

Actions: Expand to covering CIDR · List addresses

Example

Choose List addresses to include both endpoints; this differs from the default covering-CIDR action.

Example action and settings

Action: List addresses
Maximum output addresses: 4096

Input / action

192.0.2.3 - 192.0.2.5

Result / expected behavior

192.0.2.3
192.0.2.4
192.0.2.5

Available options: Maximum output addresses

Scope and limitations

List limit defaults to 4096 and may be 1–65536; oversized ranges are rejected, not truncated.
Wildcards must be consecutive trailing octets; covering CIDR requires start and end addresses.

Common mistakes

Lists include network and broadcast addresses; one covering CIDR can include extra addresses outside the requested range.

Privacy and browser support

Input is processed in this browser. Do not use real keys or active sensitive credentials as demonstration data. Device features require browser support and your permission.