Subnet Calculator (CIDR).

Compute IP subnet bounds, binary breakdowns, wildcard masks, and host quantity ranges.

Input Parameters

Base IP Address

CIDR Prefix

Subnet Mask-

Network ID-

Broadcast-

Total Usable-

Comments & Feedback.

Documentation

User manual & function guide.

Detailed manual explaining every function, input parameter, and operational example for the Subnet Calculator (CIDR).

Base IP & CIDR Prefix

Function

IP address and subnet CIDR mask.

Example Operation IP = 192.168.1.1, CIDR = /24

Subnet Architecture

Function

Computes netmask, network ID, broadcast IP, and usable host count.

Example Operation 192.168.1.1/24 -> Subnet Mask: 255.255.255.0, Network: 192.168.1.0, Broadcast: 192.168.1.255, Usable Hosts: 254

Frequently asked questions.

What is CIDR notation?

CIDR (Classless Inter-Domain Routing) notation expresses an IP address and its associated subnet mask as a suffix indicating the number of network bits. For example, /24 means the first 24 bits are the network portion, giving a subnet mask of 255.255.255.0.

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