Thực tế

IP Subnet Calculator

🌐IP Subnet Calculator

IP Address

e.g. 192.168.1.0

CIDR Prefix (e.g. 24)

/8 to /32

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We're working on a comprehensive educational guide for the IP Subnet Calculator in your language. The content below is shown in English.

Là gì IP Subnet Calculator?

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An IP subnet calculator breaks an IP address space into smaller networks. CIDR (Classless Inter-Domain Routing) notation specifies how many bits belong to the network portion — /24 means 24 bits for network, 8 bits for hosts, allowing 254 usable host addresses. Subnetting is essential for network design, router configuration, and firewall rules.

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

Công thức

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f(x)Subnet mask = n ones followed by (32−n) zeros in binary

Cách IP Subnet Calculator

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1IP addresses are 32-bit numbers (IPv4), written as 4 octets: e.g. 192.168.1.0
2CIDR /n means first n bits are the network address
3Subnet mask = n ones followed by (32−n) zeros in binary
4Network address = IP AND subnet mask
5Broadcast address = network address OR NOT(subnet mask)
6Usable hosts = 2^(32−n) − 2 (subtract network and broadcast addresses)

Ví dụ có lời giải

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Ví dụ 1

Cho trước:192.168.1.0/24

Kết quả:Network: 192.168.1.0, Broadcast: 192.168.1.255, Hosts: 254

/24 gives 256 addresses, 254 usable

Ví dụ 2

Cho trước:10.0.0.0/8

Kết quả:Network: 10.0.0.0, Hosts: 16,777,214

Class A private range — 16 million hosts

Ứng dụng thực tế

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Academic homework and exam preparation

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Engineering and architecture calculations

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Everyday measurement tasks around the home

Common CIDR Subnet Sizes

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CIDR	Subnet Mask	Usable Hosts	Typical Use
/30	255.255.255.252	2	Point-to-point links
/29	255.255.255.248	6	Small office
/28	255.255.255.240	14	Small network
/27	255.255.255.224	30
/24	255.255.255.0	254	Standard LAN
/16	255.255.0.0	65,534	Large campus
/8	255.0.0.0	16,777,214	ISP / Class A

Câu hỏi thường gặp

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What is Ip Subnet?

How accurate is the Ip Subnet calculator?

The calculator uses the standard published formula for ip subnet. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Ip Subnet calculator use?

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Ip Subnet calculator use?

The core formula is: Subnet mask = n ones followed by (32−n) zeros in binary. Each step in the calculation is shown so you can verify the result manually.

Tài liệu tham khảo

Formula-verified for precision

Reviewed October 2026

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IP Subnet Calculator