IPv4 Subnet Calculator

Configuration

IP Address

Format: xxx.xxx.xxx.xxx

Subnet Mask

Format: xxx.xxx.xxx.xxx or /xx

Results

Network Address

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Broadcast Address

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Host Range

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Number of Hosts

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Mask (Decimal)

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Mask (Binary)

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CIDR Notation

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Network Class

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Useful Information

Address Classes

Class A: 1.0.0.0 - 126.255.255.255 (/8)
Class B: 128.0.0.0 - 191.255.255.255 (/16)
Class C: 192.0.0.0 - 223.255.255.255 (/24)

Private Addresses

Class A: 10.0.0.0/8
Class B: 172.16.0.0/12
Class C: 192.168.0.0/16