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🌐 CIDR Calculator

// subnet range · broadcast · host count · binary breakdown

All subnet calculations run entirely in your browser using bitwise arithmetic. No data is sent to any server.
Prefix /24 24
Examples:
Binary breakdown
/24
Split into subnets
Divide into
IPv4 address space reference
Block Range Hosts Purpose RFC
10.0.0.0/8 10.0.0.0 – 10.255.255.255 16,777,214 Private RFC 1918
172.16.0.0/12 172.16.0.0 – 172.31.255.255 1,048,574 Private RFC 1918
192.168.0.0/16 192.168.0.0 – 192.168.255.255 65,534 Private RFC 1918
127.0.0.0/8 127.0.0.0 – 127.255.255.255 16,777,214 Loopback RFC 5735
169.254.0.0/16 169.254.0.0 – 169.254.255.255 65,024 Link-local RFC 3927
100.64.0.0/10 100.64.0.0 – 100.127.255.255 4,194,302 Shared addr space RFC 6598
0.0.0.0/8 0.0.0.0 – 0.255.255.255 — This network RFC 1122
255.255.255.255/32 255.255.255.255 — Broadcast RFC 919