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Network tools
IP subnetting calculator
Compute network and broadcast addresses, host ranges, CIDR, masks, and IPv6 prefixes - client-side for quick planning and troubleshooting.
Configuration
IP version
IPv4 address
Mask input
CIDR notation
Network bits (0–32)
Quick CIDR
Network information
Derived from your inputs (updates as you type)
- Network address
- 192.168.1.0
- Broadcast address
- 192.168.1.255
- First host
- 192.168.1.1
- Last host
- 192.168.1.254
- Total hosts
- 256
- Usable hosts
- 254
- CIDR
- /24
- Subnet mask
- 255.255.255.0
- Wildcard mask
- 0.0.0.255
Binary representation
- IP address
- 11000000.10101000.00000001.00000000
- Network address
- 11000000.10101000.00000001.00000000
- Broadcast address
- 11000000.10101000.00000001.11111111
- Subnet mask
- 11111111.11111111.11111111.00000000
Common subnet sizes
- /24: 254 usable hosts (typical LAN)
- /25: 126 hosts
- /26: 62 hosts
- /27: 30 hosts
- /28: 14 hosts
- /29: 6 hosts
- /30: 2 hosts (point-to-point)
RFC 1918 private ranges
Not routable on the public internet; use with NAT as needed.
- 10.0.0.0/8
- 10.0.0.0 – 10.255.255.255
- Class A private (~16.7M addresses)
- 172.16.0.0/12
- 172.16.0.0 – 172.31.255.255
- Class B private (~1M addresses)
- 192.168.0.0/16
- 192.168.0.0 – 192.168.255.255
- Class C private (~65k addresses)