Home › Lifestyle & Everyday › General Utility › CIDR Calculator CIDR Calculator (IPv4) Convert CIDR to IP ranges, subnet and supernet networks, summarize multiple CIDR blocks, and detect overlaps. Built for network engineers, SREs, and students. 1. Single CIDR

Subnet details CIDR notation (e.g. 192.168.1.0/24) Or IP + subnet mask Subnet mask Calculate Clear Subnet summary Network Network address – Broadcast address – First usable – Last usable – Size & mask Subnet mask – Wildcard mask – Total addresses – Usable hosts – Prefix length – Show binary representation IP address: – Subnet mask: – Subnetting helper Target prefix length Select /mask List subnets Subnet First Last 2. Multiple CIDR tools (summarize & overlap) Paste one CIDR per line to summarize, merge, or check for overlaps. Summarize