IP subnet calculator
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Result
Network address192.168.10.64
Broadcast address192.168.10.127
Subnet mask255.255.255.192
Usable hosts62
Host range192.168.10.65 – 192.168.10.126
Step-by-step solution
Mask
/26 → 255.255.255.192
Network and broadcast
network = IP AND mask = 192.168.10.64
broadcast = network OR inverted mask = 192.168.10.127
hosts = 26 − 2 = 62
Key formulas
- Hosts per subnet
- 2(32 − prefix) − 2 (/31: 2, /32: 1)
- Block size
- 256 − (mask octet)
- Network address
- IP AND mask
- Broadcast address
- IP OR (NOT mask): all host bits set to 1
- Subnets from n borrowed bits
- 2n
Practise IPv4 subnetting
A calculator gives the answer. In the exam you need the method: practise it with new problems, hints and worked solutions.