IPv4 Subnet Calculator
Find the network, broadcast, host range, masks and address type of an IPv4 subnet, and split it.
Also accepts 10.0.0.0/8 or 10.0.0.0 255.0.0.0
Private: not routed on the public internet.
Details
- Network address
- 192.168.1.0
- Broadcast address
- 192.168.1.255
- Usable host range
- 192.168.1.1 – 192.168.1.254
- Usable hosts
- 254
- Total addresses
- 256 (2^8)
- Subnet mask
- 255.255.255.0
- Wildcard mask
- 0.0.0.255
- Address type
- Private (RFC 1918)
- Legacy class
- C (no longer used for routing)
- IP in binary
11000000. 10101000. 00000001. 00001010 - Mask in binary
11111111. 11111111. 11111111. 00000000 - IP in hex
- 0xC0A8010A
4 subnets of /26, 62 usable hosts each.
| # | Network | Usable range | Broadcast | Hosts |
|---|---|---|---|---|
| 1 | 192.168.1.0/26 | 192.168.1.1 – 192.168.1.62 | 192.168.1.63 | 62 |
| 2 | 192.168.1.64/26 | 192.168.1.65 – 192.168.1.126 | 192.168.1.127 | 62 |
| 3 | 192.168.1.128/26 | 192.168.1.129 – 192.168.1.190 | 192.168.1.191 | 62 |
| 4 | 192.168.1.192/26 | 192.168.1.193 – 192.168.1.254 | 192.168.1.255 | 62 |
IPv4 Subnet Calculator FAQ
How many usable hosts are in a /24?
254. A /24 has 256 addresses; the first is the network address and the last is the broadcast address, so 254 can be given to devices.
Why does a /31 have 2 usable addresses?
RFC 3021 lets point-to-point links between two routers use both addresses of a /31, because such a link needs no broadcast address. A /32 is a single host address.
What is a wildcard mask?
It is the subnet mask with the bits flipped, such as 0.0.0.255 for 255.255.255.0. Cisco access lists and OSPF use it to say which bits of an address can vary.
What is the difference between a private and a public IP address?
Private addresses (10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16) are for home and office networks and are not routed on the internet. Public addresses are reachable on the internet. 100.64.0.0/10 is shared CGNAT space that many Indian mobile and broadband providers use.
How do I split a network into smaller subnets?
Open Split into smaller subnets and enter how many you need; the tool rounds up to a power of two and picks the prefix. For example, 4 subnets of a /24 gives four /26 networks of 62 usable hosts each.
Is any data sent to a server?
No. All calculations run in your browser and nothing is saved.