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HQ8T

IP Subnet Calculator

Network, mask, broadcast and host range.

Network address192.168.1.0/24
Subnet mask255.255.255.0
Wildcard mask0.0.0.255
Broadcast address192.168.1.255
First usable host192.168.1.1
Last usable host192.168.1.254
Usable hosts254
Total addresses256
IP classC
Private or publicPrivate (RFC 1918)
Mask in binary11111111.11111111.11111111.00000000

How to use

  1. 1Type an IPv4 address, or paste CIDR like 10.0.0.0/16.
  2. 2Move the slider to set the prefix length.
  3. 3Read the network, broadcast, mask and host range.
  4. 4Copy all the details in one click.

Frequently asked questions

How many hosts does a /24 have?

256 addresses, of which 254 are usable. The first is the network address and the last is the broadcast.

What are private IP ranges?

10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16. They're used inside homes and offices and aren't reachable from the internet.

Why do /31 and /32 show no lost addresses?

A /32 is a single host and a /31 is used for point-to-point links, so there's no separate network or broadcast address.

What is a wildcard mask?

The inverse of the subnet mask, used in router ACLs such as Cisco. For 255.255.255.0 it's 0.0.0.255.

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