How do I calculate the broadcast address?

Find the network address, then set all host bits to one. Equivalently, add block size minus one to the network ID. This tool performs that step from your IP and mask.

What is a broadcast address?

It is the last IPv4 address in a subnet. Devices use it to send a packet to every host in that local network segment.

Can a broadcast address be assigned to a host?

No. On a standard IPv4 LAN you must not assign the broadcast address to an interface. This calculator flags that rule explicitly.

How do I find the broadcast address from CIDR?

Convert the prefix to a mask, locate the network ID, then fill host bits with ones. Example: 10.0.0.5/30 yields broadcast 10.0.0.7.

What is the difference between broadcast and network address?

The network address is the first address and names the subnet. The broadcast address is the last address and targets all hosts. Usable host IPs sit between them.

What is Broadcast Address Calculator?

A free online calculator that returns the IPv4 broadcast address from an IP plus CIDR or subnet mask for study and admin work.

How does the Broadcast Address Calculator work?

It derives the network from your mask, computes the matching broadcast, and shows usable hosts so you can see the full boundary picture.

How do I use the Broadcast Address Calculator?

Enter the IP and prefix or mask, optionally pick an example, and read the highlighted broadcast result.

Is this Broadcast Address Calculator free to use?

Yes. It is free for beginners, CCNA students, engineers, and home-lab practice.

Can I use the Broadcast Address Calculator on mobile?

Yes. Mobile browsers are supported so you can check broadcast values during a lab or site visit.

Free Broadcast Address Calculator, From CIDR or Mask

Free Broadcast Address Calculator, From CIDR or Mask | Binary Tech