CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and routing that replaces the old class-based system.

How to convert CIDR to decimal subnet mask?

Use our converter to enter a CIDR address (e.g., 192.168.1.0/24) and get the corresponding subnet mask in decimal format.

What are the benefits of CIDR?

CIDR allows better use of IP address space, reducing waste and making routing more efficient.

🔢 CIDR to Decimal Subnet Mask Converter

Quickly convert your CIDR address to a decimal mask.

Enter a CIDR address like 192.168.1.0/24 and get the corresponding decimal subnet mask.

📥 Enter CIDR address for conversion

📘 What is CIDR?

CIDR (Classless Inter-Domain Routing) is a notation used to represent IP address ranges more flexibly and efficiently. Instead of using old classes (A, B, and C), CIDR uses a slash followed by the number of mask bits, like: 192.168.0.1/24.

📚 Why convert to decimal mask?

Converting to decimal mask helps better understand how IP bits are used to define the network and hosts. It is essential for those working with networks, routers, firewalls, and VPNs.

🔧 Conversion Examples

/24 → 255.255.255.0
/16 → 255.255.0.0
/8 → 255.0.0.0

❓ Frequently Asked Questions

Can I use this converter for IPv6?
Currently, this tool is focused on IPv4 only. IPv6 support is planned for the future.

Do I need to install anything?
No! This tool is fully online and free, working directly in your browser.

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