CIDR to IP Range
Turn a CIDR block into network, broadcast, first/last host and total addresses.
- Runs in your browser
- No upload on server
- Free, forever
- Enter details
- Run check
- Copy result
- Network
- 192.168.1.0
- Broadcast
- 192.168.1.255
- First host
- 192.168.1.1
- Last host
- 192.168.1.254
- Subnet mask
- 255.255.255.0
- Total addresses
- 256
- Usable hosts
- 254
How this works — and why it's private
- Type any IPv4 CIDR block, like 10.0.0.0/16.
- See the network, broadcast and host range instantly.
- Copy any value to use in your firewall or VPC config.
All math runs locally — nothing leaves your browser.
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