IPv4 Range Expander
Expand a CIDR block or IP address range into a full list of individual addresses.
CIDR block or IP range
Accepts CIDR notation (10.0.0.0/28) or a plain range (10.0.0.1-10.0.0.10). Capped at 65,536 addresses to keep your browser responsive.
About this tool
IPv4 Range Expander lists out every individual address covered by a CIDR block (like 192.168.1.0/29) or a plain start-end range (like 10.0.0.1-10.0.0.10) — useful for firewall rules, allow-lists, or any tool that needs individual addresses rather than a compact range notation. To keep things fast in the browser, the list is capped at 65,536 addresses (a /16 block); anything larger will need to stay in CIDR form or be split into smaller chunks.
Version 1.0.0