Subnet Calculator
Plan IPv4 subnets with CIDR notation and visualize usable host ranges.
Network
Network address
192.168.10.0/24
Broadcast address
192.168.10.255
Netmask
255.255.255.0
Wildcard mask
0.0.0.255
Total addresses
256
Usable hosts
254
First usable
192.168.10.1
Last usable
192.168.10.254
Binary view
IP : 11000000.10101000.00001010.00000000
Mask: 11111111.11111111.11111111.00000000
Subnet breakdown
192.168.10.0/26
Network: 192.168.10.0
Broadcast: 192.168.10.63
Usable range: 192.168.10.1 - 192.168.10.62
Usable hosts: 62
192.168.10.64/26
Network: 192.168.10.64
Broadcast: 192.168.10.127
Usable range: 192.168.10.65 - 192.168.10.126
Usable hosts: 62
192.168.10.128/26
Network: 192.168.10.128
Broadcast: 192.168.10.191
Usable range: 192.168.10.129 - 192.168.10.190
Usable hosts: 62
192.168.10.192/26
Network: 192.168.10.192
Broadcast: 192.168.10.255
Usable range: 192.168.10.193 - 192.168.10.254
Usable hosts: 62
VLSM planner
Enter host requirements (e.g. HQ:500 or 60) separated by new lines or commas.
Insufficient address space to allocate "HQ" (needs /24).
Data Center
Requirement: 2,000 hosts
Allocated: 254 hosts (192.168.10.0/24)
Network: 192.168.10.0
Usable range: 192.168.10.1 - 192.168.10.254
Broadcast: 192.168.10.255
Remaining unallocated addresses: 0