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Subnet /24: Mask 255.255.255.0, 254 Hosts, Address Range

Calculate the network address, broadcast, subnet and wildcard masks, host range and usable host count for any IPv4 address and CIDR prefix.

Processing... 0%
Parsing IPv4 address
Applying subnet mask
Computing host range
Done

Result

A /24 prefix means the first 24 of the 32 bits in an IPv4 address identify the network and only the last 8 bits are left for hosts. It is the most common subnet size in home routers, office LANs and small server segments: everything from 192.168.1.0 to 192.168.1.255 belongs to one broadcast domain, and addresses differ only in the final octet.

The subnet mask is 255.255.255.0 — twenty-four ones followed by eight zeros. Eight host bits give 2^8 = 256 addresses; subtracting the network address and the broadcast address leaves 2^8 − 2 = 254 usable hosts. In 192.168.1.0/24 that range runs from 192.168.1.1 to 192.168.1.254, with 192.168.1.255 acting as the broadcast address.

This page opens the subnet calculator with /24 preselected: type any IPv4 address and it returns the network address, broadcast, wildcard mask and the exact first and last usable host. All arithmetic is plain 32-bit integer math executed in your browser — nothing is sent to a server, and the calculator keeps working offline once loaded.

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Executed in Browser

Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

  • Network address, broadcast address, subnet mask and wildcard mask for any IPv4/CIDR pair.
  • First and last usable host plus usable-host and total-address counts (2^(32−p) − 2 arithmetic).
  • IP class note for the entered address and a one-click copy of the full result summary.

Key Benefits

✓ One input pair — IP address and prefix — returns everything at once: network, broadcast, both masks, host range and address counts.
✓ Pure 32-bit integer math computed locally in your browser: no server round-trip, no lookup tables, correct for every prefix from /8 to /30.
✓ The IP class note explains what the first octet implies — classful history, loopback and reserved ranges — so the numbers come with context.

Use Cases

  • • Size a VLAN or office LAN: check how many usable hosts a /23 or /24 really gives before assigning the range.
  • • Fill in firewall or ACL rules with the exact network address, wildcard mask and broadcast for any IP/prefix pair.
  • • Practice CIDR arithmetic for networking exams by verifying your hand-calculated masks, ranges and host counts.