Free IT Tool
Subnet Calculator
Calculate network address, broadcast, usable IP range, wildcard mask, and binary representation from any IP address and CIDR notation or subnet mask. Built for IT professionals by Echoflare.
Network Address
192.168.1.0
Broadcast Address
192.168.1.255
Usable IP Range
192.168.1.1 — 192.168.1.254
Total Hosts
256
Usable Hosts
254
Wildcard Mask
0.0.0.255
Subnet Mask
255.255.255.0
CIDR Notation
/24
IP Class
Class C
Binary Representation (network bits in purple, host bits in orange)
Previous Subnet
192.168.0.0/24
Next Subnet
192.168.2.0/24
Common Subnets Reference
Click any row to calculate| CIDR | Mask | Hosts | Usable | Wildcard | Common Use |
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How to Use the Subnet Calculator
Enter an IP Address
Type any valid IPv4 address like 192.168.1.0, 10.0.0.0, or 172.16.0.0. The calculator accepts any IP in the range 0.0.0.0 to 255.255.255.255.
Type any valid IPv4 address like 192.168.1.0, 10.0.0.0, or 172.16.0.0. The calculator accepts any IP in the range 0.0.0.0 to 255.255.255.255.
Set the CIDR Prefix
The CIDR number (0 to 32) defines how many bits are used for the network portion. /24 means the first 24 bits are the network, leaving 8 bits for hosts (254 usable). Smaller CIDR = larger network.
The CIDR number (0 to 32) defines how many bits are used for the network portion. /24 means the first 24 bits are the network, leaving 8 bits for hosts (254 usable). Smaller CIDR = larger network.
Or Use a Subnet Mask
Instead of CIDR, you can type a subnet mask like 255.255.255.0. The calculator automatically converts between CIDR and mask notation.
Instead of CIDR, you can type a subnet mask like 255.255.255.0. The calculator automatically converts between CIDR and mask notation.
Reading the Results
Network Address: The first address in the subnet (identifies the network).
Broadcast Address: The last address (used to send to all hosts).
Usable Range: Addresses available for devices (between network and broadcast).
Wildcard Mask: Inverse of subnet mask (used in ACLs and OSPF).
Network Address: The first address in the subnet (identifies the network).
Broadcast Address: The last address (used to send to all hosts).
Usable Range: Addresses available for devices (between network and broadcast).
Wildcard Mask: Inverse of subnet mask (used in ACLs and OSPF).
Binary View
Purple bits are network bits. Orange bits are host bits. This helps visualize where the subnet boundary falls.
Purple bits are network bits. Orange bits are host bits. This helps visualize where the subnet boundary falls.
Copy and Print
Click "Copy" on any result to copy it to your clipboard. Use the "Print Results" button for a clean printout of your calculation.
Click "Copy" on any result to copy it to your clipboard. Use the "Print Results" button for a clean printout of your calculation.