IPv4 Subnet Calculator
Calculate subnet details from IPv4 address and subnet mask. Get network address, broadcast address, host range, and advanced networking information.
Network Configuration
Enter IPv4 address and subnet mask to calculate subnet details
Include binary representation, wildcard mask, and IPv6 mappings
Subnet Details
Enter an IPv4 address and subnet mask, then click Calculate to see subnet details.
Understanding IPv4 Subnetting
Key Concepts
- Network Address: First address in subnet (all host bits = 0)
- Broadcast Address: Last address in subnet (all host bits = 1)
- Host Range: Usable addresses between network and broadcast
- CIDR Notation: /24 means first 24 bits are network portion
IP Classes (Legacy)
- Class A: 0-127 (8-bit network, 24-bit host)
- Class B: 128-191 (16-bit network, 16-bit host)
- Class C: 192-223 (24-bit network, 8-bit host)
- Class D: 224-239 (Multicast)
- Class E: 240-255 (Experimental)
Example Calculation
IP: 192.168.1.130/24
Subnet mask: 255.255.255.0
Network: 192.168.1.0
Broadcast: 192.168.1.255
Host range: 192.168.1.1 - 192.168.1.254
Total addresses: 2^(32-24) = 256
Usable hosts: 256 - 2 = 254
Private IP Ranges
- 10.0.0.0/8: 10.0.0.0 - 10.255.255.255
- 172.16.0.0/12: 172.16.0.0 - 172.31.255.255
- 192.168.0.0/16: 192.168.0.0 - 192.168.255.255