Subnet calculator
Enter an IPv4 or IPv6 range in CIDR form. Everything is calculated in your browser.
A bare address counts as a single host (/32 or /128).
Summary
- Network
- 192.168.10.0/24
- Netmask
- 255.255.255.0
- Wildcard mask
- 0.0.0.255
- Broadcast
- 192.168.10.255
- First usable
- 192.168.10.1
- Last usable
- 192.168.10.254
- Total addresses
- 256
- Usable hosts
- 254
- Netmask in binary
- 11111111.11111111.11111111.00000000
- Type
- Private (RFC 1918)
Split into subnets
| Subnet | Usable range | Hosts |
|---|---|---|
| 192.168.10.0/26 | 192.168.10.1 – 192.168.10.62 | 62 |
| 192.168.10.64/26 | 192.168.10.65 – 192.168.10.126 | 62 |
| 192.168.10.128/26 | 192.168.10.129 – 192.168.10.190 | 62 |
| 192.168.10.192/26 | 192.168.10.193 – 192.168.10.254 | 62 |
Check for overlaps
Paste ranges from a VLAN plan or a firewall object list, one per line.
Results show up here once there are two or more ranges.
Private: runs in your browser
This tool runs entirely on your device. What you enter isn't sent to this site or to any other service, and nothing is kept after you leave the page.
The range you enter is kept in the page address after the # sign, so you can bookmark or share it. That part of the address isn't sent to this site.