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CIDR & Subnet IP Calculator

Calculate IPv4/IPv6 subnets, network/broadcast addresses, usable host ranges, and wildcard masks.

Direct Answer (Quick Result)

CIDR & Subnet IP Calculator on ApexTools is a free, privacy-first online utility. All computations and file transformations process locally or within private auto-purged memory with zero sign-up.

Instant browser processing Private & Auto-Purged•Updated:

CIDR & Subnet IP CalculatorIPv4 & IPv6

Client-side subnets, network/broadcast math, binary visualizer, and VLSM breakdown.

100% Client-Side Privacy Guaranteed

Your data is computed entirely inside your browser's JavaScript engine and is never transmitted across the network.

Presets:
Usable Hosts
254
Total: 256 IPs
Network Address
192.168.1.0
CIDR: /24
Subnet Mask
255.255.255.0
Wildcard: 0.0.0.255
Network Class & Scope
Class CPrivate (RFC 1918)
Private Network (RFC 1918 - Class C)

Subnet Addressing Breakdown

CIDR Notation:
192.168.1.1/24
Network Address:
192.168.1.0
Broadcast Address:
192.168.1.255
First Usable Host:
192.168.1.1
Last Usable Host:
192.168.1.254
Subnet Netmask:
255.255.255.0
Wildcard / Inverse Mask:
0.0.0.255
IP Integer / Long Decimal:
3232235777
IP Hexadecimal:
0xC0A80101
IPv4-Mapped IPv6:
::ffff:192.168.1.1
6to4 Prefix (/48):
2002:c0a8:0101::/48

32-Bit Binary Representation

Network (24b) Host (8b)
IP Address Binary
11000000101010000000000100000001
Subnet Mask Binary
11111111111111111111111100000000
Network Binary
11000000101010000000000100000000
Broadcast Binary
11000000101010000000000111111111
Wildcard Binary
00000000000000000000000011111111
Usable Host IP Range:254 Hosts
192.168.1.1192.168.1.254
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How to Convert with CIDR & Subnet IP Calculator

Follow these 3 simple steps to complete your conversion in seconds.

1
Step 1 of 3

Enter Input Value or Data

Input your value or paste text into the input field for CIDR & Subnet IP Calculator.

💡 Tip: Supports real-time computation as you type.
2
Step 2 of 3

Adjust Settings or Units

Select desired output format, decimal precision, or transformation flags.

3
Step 3 of 3

Copy or Save Output

The result is calculated instantly. Click Copy or Download to save your converted result.

Frequently Asked Questions

Common questions and answers about CIDR & Subnet IP Calculator.

CIDR & Subnet IP Calculator executes standard algorithmic transformation to convert Input into Output with maximum accuracy and high performance.