🌐CIDR / Subnet Calculator
Expand IPv4 CIDR blocks into network, broadcast, usable range, host counts, and netmask — instantly.
Result
- Network
- 10.0.0.0
- Broadcast
- 10.0.0.255
- Netmask
- 255.255.255.0
- Wildcard
- 0.0.0.255
- First host
- 10.0.0.1
- Last host
- 10.0.0.254
- Total addresses
- 256
- Usable hosts
- 254
Cloud note: AWS reserves 5 addresses per subnet (first 4 + broadcast), so usable there is 251.
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