CIDR Calculator

networkPopular

Calculate IPv4/IPv6 subnets, network masks, usable host ranges, CIDR blocks, and visual bit allocation.

100% Client-Side — Processed privately & locally in your browser.

Presets:

CIDR Block or IP AddressPrivate

/24

Subnet Mask Equivalent/24

CIDR Prefix Length Slider:/24 (255.255.255.0)

/0 (Internet)/8 (Class A)/16 (Class B)/24 (Class C)/28/30/32 (Host)

Network Address

192.168.1.0

Subnet starting route identifier

Broadcast Address

192.168.1.255

Subnet broadcast destination

Usable Host Count254 IPs

254

Out of 256 total addresses

IP Class & Scope

Class C•Private

Private (RFC 1918 192.168.0.0/16)

Subnet Technical Specifications

Usable Host Range

192.168.1.1 – 192.168.1.254

Subnet Netmask

255.255.255.0

Wildcard (Inverse) Mask

0.0.0.255

CIDR Notation

192.168.1.0/24

Integer Representation

3,232,235,776

Hexadecimal Value

0xC0A80100

32-Bit Binary RepresentationPrefix: 24 bits network / 8 bits host

IP Address Binary:192.168.1.0

11000000.10101000.00000001.00000000

Netmask Binary:255.255.255.0

11111111.11111111.11111111.00000000

Network Address Binary:192.168.1.0

11000000.10101000.00000001.00000000

Subnet Partitioning Explorer

Divide into:

Splits 192.168.1.0/24 into 4 smaller /26 subnets:

Subnet CIDR	Usable Host Range	Usable Hosts
192.168.1.0/26	192.168.1.1 – 192.168.1.62	62
192.168.1.64/26	192.168.1.65 – 192.168.1.126	62
192.168.1.128/26	192.168.1.129 – 192.168.1.190	62
192.168.1.192/26	192.168.1.193 – 192.168.1.254	62

1Enter an IP address and CIDR prefix (e.g., 192.168.1.0/24) or choose from common templates.
2Adjust the interactive prefix slider to instantly recompute netmask, broadcast, and usable host range.
3Inspect the 32-bit binary breakdown with network and host bit visual coloring.
4Review the subnet partitioning table to plan multi-tier VPCs or subnets.

Frequently Asked Questions

Is my data sent to any server?

No. All processing for this tool occurs directly within your web browser using Web APIs and WebAssembly. Your data never leaves your computer.

Can I use this tool offline?

Once loaded, most utilities remain functional even if your connection drops. DevtUtils is designed to be lightweight and resilient.

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