Free Online Tool

Online Subnet & IP CIDR Calculator

Calculate Subnet Mask, Network ID, Broadcast IP, and Usable Host Range for any IPv4 address and CIDR prefix.

CIDR Notation (/24, /28, /30)Network & Broadcast AddressesUsable Host Range100% Free

Subnet Accountla FAQ

IP Address (IPv4) CIDR Subnet Mask

Kullanılabilir Host IP Sayısı: 254 IP

Subnet Maskesi: 255.255.255.0

Network Kimliği (ID): 192.168.1.0

Broadcast IP Adresi: 192.168.1.255

İlk Kullanılabilir Host IP: 192.168.1.1

Son Kullanılabilir Host IP: 192.168.1.254

Subnet MaskDetermines network size (e.g. 255.255.255.0)

Usable HostsTotal assignable IPs for servers

Formula

Step by step

How to Calculate Subnet?

3 steps.

Enter IP

Type IPv4 block (e.g. 192.168.1.0).

Choose CIDR

Select /24, /28 or /30 prefix.

View Output

Check First IP, Last IP, and Broadcast IP.

Tips

Use /30 subnet for point-to-point connections.

Warnings

Network ID and Broadcast IP cannot be assigned to hosts.

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FAQ