IPv4 Subnet Calculator | Calculate Subnet Information

A powerful tool to calculate subnet information, IP ranges, and network details from CIDR notation or IP address with subnet mask.


Valid formats: Dotted Decimal Format

Quick Example

Click any to use

Subnet Result

CIDR Notation

Network Address

Subnet Mask

Wildcard Mask

Broadcast

Network Bits

Start Range

End Range

IP Type

Hosts Count

How to Use IPv4 Subnet Calculator

1

Enter IPv4 Address

Input a valid IPv4 address in the format xxx.xxx.xxx.xxx (e.g., 192.168.1.1).

2

Choose Subnet Mask

Our tool provides a drop-down box option for subnet mask, which enables you to conveniently select subnet mask.

3

Calculate Results

Subnet rusults will be automatically generated and appear in the result field.

Frequently Asked Questions About IPv4 subnets

A subnet (short for "subnetwork") divides a single large network into smaller, interconnected segments. This segmentation reduces unnecessary traffic by confining communication within the same subnet, minimizing congestion and improving data transfer speeds.
A subnet mask is a 32-bit number that separates the IP address into network and host addresses. It helps determine which part of an IP address identifies the network and which part identifies the specific device on that network.
CIDR (Classless Inter-Domain Routing) notation is a compact representation of an IP address and its associated subnet mask. It's written as the IP address followed by a slash (/) and a number (e.g., 192.168.1.1/24), where the number indicates the number of network bits in the subnet mask.
Both represent the network portion of an IP address. A subnet mask uses four octets (e.g., 255.255.255.0), while CIDR uses a slash followed by a number (e.g., /24). They are different notations for the same information.
Subnetting divides a large network into smaller, more manageable sub-networks. This improves network performance by reducing broadcast traffic, enhances security by isolating network segments, and simplifies network management and troubleshooting.