IP Subnet Calculator
Calculate subnet information, network addresses, and usable IP ranges
ℹ️ About CIDR Notation
- • /24: 256 total addresses, 254 usable (typical home network)
- • /16: 65,536 total addresses, 65,534 usable (large office)
- • /8: 16,777,216 total addresses (Class A network)
- • Higher CIDR number = smaller subnet (fewer hosts)
- • Lower CIDR number = larger subnet (more hosts)